Tzakiel, this is coming along very nicely. I really like the influences from Japanese cabinets, which you rarely see around here. I'm planning an Astro-City style cab.
Your video looks great. I was going to ask if you're matching native refresh rate along with resolution, but if you're using GroovyMAME's autogeneration you're good to go.
Is the TV not decased though? It looks you can see the TV's case behind the bezel. I think that would be worth fixing. It looks like it's going to be a very classy cabinet overall, and that is kind of a slight blemish all around the screen.
You might want to look into better audio if you describe the current speakers as "crappy," haha. It can be argued that good audio is as important as video. A lot of these games can sound really great with the right setup. You could either build some custom speakers into the cab or at least get some quality PC speakers. There's no replacement for cone size. Little satellites and a subwoofer equals over-emphasized high and lows, with almost no midrange.
I love that you selected Sanwa sticks and buttons and the Astro City layout. Once you get used to the best you can't go back. I'm guessing you're using Happs for administrative buttons because you can't get labelled Sanwas? You can get clear top Seimitsu buttons that you can put paper inserts into to label them whatever you want. Those would match your main Sanwas a lot better in look and feel. You can even put the inner plunger of a Seimitsu button into the outer frame of a Sanwa to get it really close. Same microswitch, same feel.
Also, if you're going to be playing shmups, you might want to check out my JLF mod. The stock JLF is not so hot for shmups due to its long engage and throw distances.
From your game list I really like your taste in games. It looks like you're really into fighters, shmups, and 2D platformers, which are my favorite genres (not including other genres that don't work well on a cab). I laughed when I saw Cho Aniki.
I don't have an organized list of what I'm planning to use from MAME, but I do have a list of console games I want to support on my cab if you're interested in looking at it. I think you might like some of these:
-Nintendo-
Battle Kid: Fortress of Peril
Blaster Master
Bionic Commando
Crisis Force (NTSC-J)
Gargoyle's Quest II
Guardian Legend
Gun-Nac
Little Samson (Seirei Densetsu Lickle)
Mega Man
Mega Man 2
Mega Man 3
Metal Storm
Mike Tyson's Punch-Out!!
Mr. Gimmick (Gimmick!)
Recca - Summer Carnival '92 (NTSC-J)
Super Turrican
Zanac
-PC Engine-
Blazing Lazers (Gunhed): Caravan '89
Super Star Soldier: Caravan '90
Final Soldier: Caravan '91 (NTSC-J)
Soldier Blade: Caravan '92 (NTSC-J)
-PC Engine CD-
Gate of Thunder
Lords of Thunder
Ginga Fukei Densetsu: Sapphire (NTSC-J)
Spriggan Mark 2 (NTSC-J)
Seirei Senshi Spriggan: Summer Carnival '91 (NTSC-J)
Alzadick: Summer Carnival '92 (NTSC-J)
Nexzr Special: Summer Carnival '93 (NTSC-J)
-Sega Genesis-
Alien Soldier (NTSC-J/PAL)
Comix Zone
Contra: Hard Corps
Eliminate Down (NTSC-J)
Super Fantasy Zone (NTSC-J/PAL)
Gaiares
Gleylancer (NTSC-J)
Gunstar Heroes
Ms. Pac-Man (Tengen)
M.U.S.H.A.
Ranger X
Rocket Knight Adventures
Steel Empire
Target Earth
Thunder Force II
Thunder Force III
Lightening Force (Thunder Force IV)
Vectorman
-Sega CD-
Bari-Arm
Robo Aleste
Silpheed
Soul Star
-Super Nintendo-
Batman Returns
Biometal
Chrono Trigger
Contra III: The Alien Wars
Cybernator
Demon's Crest
Hagane (NTSC-J)
Firepower 2000
Super Ghouls 'n Ghosts
Joe & Mac
Mega Man 7
Rockman & Forte (Mega Man & Bass, NTSC-J)
Mega Man X
Mega Man X2
Mega Man X3
Metal Warriors
Ninja Warriors
R-Type III: The Third Lightning
Space Megaforce (Super Aleste)
Teenage Mutant Ninja Turtles IV: Turtles in Time
Super Turrican
Super Turrican 2
U.N. Squadron
Wild Guns
-Sega Saturn-
Assault Suits Leynos II (NTSC-J)
Guardian Heroes
Mega Man 8
Radiant Silvergun (NTSC-J)
Rayman
Thunder Force V (NTSC-J)
Virtua Fighter 2
-Playstation-
Gaia Seed (NTSC-J PSX) $
Gradius Gaiden (NTSC-J)
Guilty Gear
Harmful Park (NTSC-J) $
Mega Man X4
Mega Man X5
Mega Man X6
R-Type Delta
Silhouette Mirage
Zanac X Zanac
-Nintendo 64-
Sin & Punishment (NTSC-J)
-Sega Dreamcast-
Bangai-O
Border Down (NTSC-J)
Capcom vs. SNK
Chaos Field (NTSC-J)
ChuChu Rocket!
Fast Striker
Gunlord
Ikaruga (NTSC-J)
Last Hope - Pink Bullets
NEO XYX
Psyvariar 2 (NTSC-J)
Puyo Puyo Fever (NTSC-J)
Q*bert
Radirgy (NTSC-J)
Shikigami no Shiro II (NTSC-J)
Soul Calibur
Triggerheart Exelica (NTSC-J)
Trizeal (NTSC-J)
Under Defeat (NTSC-J)
Virtua Fighter 3TB
Zero Gunner 2 (NTSC-J)
-Playstation 2-
Contra: Shattered Soldier
Do Don Pachi Daioujou (NTSC-J)
Ibara (NTSC-J)
Gradius V
Guilty Gear X Plus
Guilty Gear XX #Reload
R-Type Final
Silpheed: The Lost Planet
Raiden III
Thunder Force VI (NTSC-J)
Soul Calibur III
Virtua Fighter 4: Evolution
-Nintendo GameCube-
Pac-Man VS. (comes with Pac-Man World 2)
Puyo Pop Fever
-XBox-
Soul Calibur II
Capcom vs. SNK 2
-XBox 360-
Deathsmiles
DoDonPachi Resurrection Deluxe Edition (PAL region-free)
Eschatos (incl. Judgement Silversword + Cardinal Sins) (NTSC-J region-free)
Espgaluda II (NTSC-J region-free)
Mushihime-Sama (NTSC-J region-free)
Mushihime-Sama Futari (NTSC-J region-free)
Raiden IV
-XBLA-
Alien Hominid HD
Deathsmiles II
Mark of the Ninja
Super Meat Boy
Mega Shooter 11
-Nintendo Wii-
Castle of Shikigami III
Sin & Punishment: Star Successor
-VC-
Contra Rebirth
Gradius Rebirth
Mega Man 9
Mega Man 10
-Playstation 3-
BlazBlue: Continuum Shift Extend
Blazblue Chrono Phantasma
Rayman Origins
Soul Calibur IV
Soul Calibur V
Super Street Fighter IV: Arcade Edition
Ultimate Marvel vs. Capcom 3
-PSN-
Guilty Gear XX Accent Core Plus
Hard Corps: Uprising
Marvel vs. Capcom Origins
Marvel vs. Capcom 2
Pac-Man Championship Edition DX
Super Street Fighter II Turbo HD Remix
Street Fighter III: Third Strike Online Edition
Virtua Fighter 5 Final Showdown
I didn't mention any Castlevania games because I prefer those with a controller, but since you're a fan I though I should mention Rondo of Blood for the PCE-CD. I think that's my favorite in the series (tough call between that and Super IV).
Anyhow, since you're using that transcoder, I think I should also mention that you could be using real hardware for console games. It will accept RGBS by connecting c sync to the h sync pin. You can get RGBS or RGBHV (VGA) from the all the consoles on our list without modifying the console itself. You just need a custom cable that can be made in a few minutes. The only exceptions to this are NES, PC-E/TG-16, and N64 (need internal RGB mod), Gamecube (cable mod only, but the cable is expensive and its more difficult), and Wii (a couple different ways to handle this one).
You mentioned your love of fighting games. I love them as well, but when other players aren't around in person, the AI doesn't really cut for me. Online play is a must. Consider that with a PS3 or 360 in the cab, you could play all of these online:
BlazBlue: Continuum Shift Extend
Guilty Gear XX Accent Core Plus
Marvel vs. Capcom Origins
Marvel vs. Capcom 2
Ultimate Marvel vs. Capcom 3
Soul Calibur V
Super Street Fighter IV: Arcade Edition
Super Street Fighter II Turbo HD Remix
Street Fighter III: Third Strike Online Edition
Virtua Fighter 5 Final Showdown
The last piece of constructive criticism is about the marquee and control panel art. I mostly agree with Badmouth's comments. It most reminds me of a mixture of Vewlix and Astro City styling. Vewlix cabs are nice, but they're slick, thin, and based around a 32" widescreen LCD. It doesn't make sense to me in relation to your project, which is a thick full bodied cab based around a CRT. I think you should lean toward cues from the Astro City, or Egret, which you also mentioned.
Also, the sketchy font for "Multicade" doesn't go with the otherwise slick design. Using the Astro City logo itself doesn't look right either. While it's closer than a Vewlix, your cab is still too different to literally call it an Astro City. Maybe you could replace the words "Astro City" with "Multicade," and use the Astro City style for "Multicade" wherever it appears, and change "Aero Dynamic Shape" to sometime representing your design.
I like the use of the developer logos in the marquee. I would just make sure those developers represent the games you'll be playing. Most of them look good, but I think maybe there are some others you could add that are more relevant to your game list than Atari. I think NEO-GEO definitely needs to go though, as it's inconsistent with the rest. All of the other logos represent developers of arcade games, whereas NEO-GEO is a type of hardware. You already have SNK there, so I'd just stick with that. Anyhow though, they look good. Maybe you could also use that in the control panel to fill up some of the empty space.
As for the characters, I'm not really a fan of them. Kirby looks totally out of place, as he's not at all arcade related. Street Fighter characters are more relative, but it's not exclusively a Street Fighter cabinet. You have a bunch of developers represent there, so to be consistent you either need lots of characters to represent all of them, or none at all. Just the ones there don't make sense to me. I would lean toward none at all, because I think what you have going could be really classy, and not having random characters would enhance that.