FWIW, I find s-video to be pretty good for low res stuff, and passable for higher res stuff. Reds can be a bit smudged out, but provided nothing has red on a black background you should be okay.
technically, the LCD lines are (digital) RGB. If someone wanted mod it for analog RGB, it's *technically* possible. However, I doubt anyone capable of devising such a mod would waste their time on it.