So I'm trying to get all my old consoles hooked up in a permanent fashion and I'm trying to find as elegant a solution as possible. Ideally it'd be nice to just have one connector coming out of my display stand to the tv but looking into it I doubt that is going to happen.
Let me try to explain what I'm wanting to do and then I'll list my proposed hookup and questions.
I'm done with crts... sorry I just can't deal with them anymore. The last of my nicer s-video enabled 27 inchers died on me a couple of years ago and I haven't looked back. I just don't have the room and I have back problems that make it a pain in the butt to lug around heavy tvs so rest assured that is not an option. What I'm using right now is a Vizio smart tv. For the most part it works pretty well but I've noticed that that latest firmware update from last winter seems to have made the composite out less reliable. It still works, but if I turn on "game mode" for some of the 240p consoles, the sync occasionally misfires and I get a glitched screen for a frame. Now this is something I could probably sort out with enough time and effort, but honestly if supporting 240p is starting to become a pain in the butt it may be time to move on.
That being said I am not one of these idgits that thinks a pixel perfect rgb signal up-scaled to 1080p without any blending looks good. Quite frankly the games weren't designed to look that way and the monitor's cruddy signal was often used as a natural anti aliasing to fake translucency effects and other stuff. That's not to say I'm that much of a purist, afterall I'm no longer using crts. What would be nice would be to get all the video up to 480p, and rgb would be ok. The TV's scalers should probably be able to blend things from there.
So I've got all the Nintendo consoles, an Xbox, a 360, a Dreamcast and I might end up getting a few sega consoles just to see how the other half lived.
Potential solutions:
Dreamcast - Well this one is easy, 20 dollar vga cable and I'm good to go. I read that a couple of games don't like vga out (I don't have those games) but it looks like I could hack the iso's to enable it and burn copies to play, is this correct?
Xbox - Component cable ftw! Does the original xbox have vga out as an option?
Wii - Ditto, but I'm kind of torn on those little hdmi adaptors they sell. My thought is the blending of the component signal makes it look better but I dunno.
Gamecube - honestly I'm not super concerned about this one... I can play my GC stuff on the Wii which has component out. I had a mythical 480p component out cable that apparently everyone on this forum thinks I made up, but after looking for two months I can't find the thing (which sucks because it was a universal cable, so I've gotta buy another one for my xbox as well.... oh also the crow eating all around would be nice, but I'm not that petty.

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Nes - Well I'm not modding my consoles, so it's rca out or nothing. My tv seems to handle the nes just fine, but they do sell these rca 2 hdmi adaptors.... again I fear the resulting image might be too sharp.
Snes - This one is interesting. You can do rgb out on it, but getting that to something usable seems to be overly convoluted. You have the option of making your own custom av cable, which would be great if you could find the parts (I can't seem to find them.) or using a scart cable and buying a 50 dollar converter box to convert that to component. With the 20 dollar scart cable that's 70 bucks to get component out on the thing.... that hardly seems worth it. My question is would it be easier/cheaper to get the signal converted to vga? Heck can modern TV's with vga ports handle cga, because if so then what the snes outputs natively should be cga compatible.
N64 - Again I'm not modding my consoles so I guess the best I'm getting on this one is svideo. Unfortunately this particular tv doesn't have a svideo port, So I'm going to need a converter box. I think some of the rca ones also do svid, so maybe use one converter box for both the n64 and nes? Maybe forget about rgb out for the snes and do all three through the same box?
So yeah unless I'm missing something a converter box is going to come into the equation at some point. So suggestions on that would be appreciated. Again, I think I'd rather have something that only outputs 480p, maybe even component out would be better as I want some blurring to be preserved. That isn't to say I'm dis-interested in hdmi out... it's certainly more future proof, I just don't want things looking too crisp. I'm definitely not interested in those 300 dollar framemiester monstrosities though.
I haven't even looked into the sega consoles btw. Is that going to be a mess?