Thanks for those direct wiki links, Scott. I will start to browse those.
I am still working on my design, and have not tried to put a 3d plan yet, but here are some pics that have been kind of my basic thought process. I probably will have feet and casters. I like the angled idea, but it depends on how I end up with the attached monitor.
Attached monitor concepts:
This was from a you tube video. I like that the monitor is attached to the base (wall mount would be an issue for me). Don’t like the glossy color (or how cramped the controls look).

Similar to the previous one, but simple wood. I do like the wood idea (but I would go darker).

More complicated, but I like that the monitor is a little further away. I think this might be a counter-weight for that angled control panel. I like the angular look of the control panel myself.

I like the look of the ‘Black Ops’ lighting. I just want to skip the ‘hard way’ for the buttons. This pic is the one I keep referring to for the lighting look I want (but with less stuff). Black Ops added to my reference pics.
I believe the correct working would be 'black button with RGB bezel'

I would prefer that specific button, but i am not going the hard route to make part of the button light up. IF someone makes something like that, I would like to check one out. Ultrimarc does not seem to have that design (without modifications). Is Paradise Arcade reputable? I don’t need top of the line, but I don’t want cheap (good long-lasting is my preference).
I did drop some money to get a bunch of buttons to compare. Should have them in a few days, so I can start testing what layout I like, and what button I like.
I got lucky today, and found the pictures I was looking for. They were from ETSY, being sold by Megacades. Now I just need to find that sweet spot between the Mortal Kombat design here, and those other ones up top.
Modular 4 player Pedestal

Not what I want, but 4 stand-alone pedestal example (in case someone else is looking for something like this)

As for the PC unit itself. That’s what started my descent into this. I got some kind of handheld aftermarket Gameboy like unit. And decided I would rather hook it up to a TV. That led me into wiping out a spare PC, and turning into a retrobat unit. Started to play some NES games, and wanted to play some Road Rash and Killer Instinct, which led me to these forums and the idea of building an arcade system.
I had read a bit about lunchbox, but have not tried it out yet. Could do that while I wait for stuff to start coming in. And I could always just pop in a different drive and keep my retrobat build (rather than wipe it out). The arcade would also act as a backup music playing station for MP3 files.