Red, Green & Blue.
I'm game for checking it out, DZ.
VGA is essentially RGB as well, displayed differently though, the image doesn't dither, it stays uncorrupted. Specially whit a monitor that can switch resolutions. The ideal is that each bulb on your screen equals each pixel of any given signal, that's what native rez means, so with that in mind when you are using RGB low rez monitors you get that vibrant look 'cause each bulb or diode or whatever they are called are counted for each pixel. The thing is that old RGB monitors like cab monitors and PVMs and what have you, have a very clean bulb separation but far from flawless, the signal will still "ghost" no matter how good it will still happen simply 'cause the technology of that time in that type of hardware was all we had. Now days we have surpassed it tenfold for the masses and thus we can see a much cleaner picture. I know nostalgia plays a key factor and hey, it still beats any residential CRT TV screen you can possibly think of but there are cleaner displays and clean is clean, you can't deny that.
Think of a Gameboy screen, any given model. Each screen is native to its capable resolution and thus you get a clear separation of pixels, that is undoubtedly clean. An old VGA CRT will also reproduce a clean separation of any given signal as long as the video card may support it. Whenever you pick a 1x1 signal it tends to look sharper than anything, that's the clean separation of pixels, that's why when upscale you loose the sharpness or in this case the clean separation of pixels. New LCD technology could never hope to reproduce this, I mean they can on a 1x1 ratio but then you have the tiniest reproduction of the graphics.
I dunno as much as I would like about video signals and hey, I think this is a pretty awesome project, I'd like to be able to play on real hardware with the best video signal possible. I don't mean to come across jaded but maybe it's 'cause I dabbled for a while on sprite making with Mugen and a bit of other pixel art creation tools, either way, RGB is better than composite which is what I got in my NES.