I don't think it's worth getting a worse image quality with component just because it's easier to plug in.
Dude, it's a N64/PSX emulator, what do you want? HDMI? That's retarded. Also, since component/rca cables are analog, the quality of the cable matters, so... If he gets a good cable, it'll look good. (You could try a monster cable, one of those belkins, etc)
In fact, it's probably a good idea to remember that the actual consoles are usually plugged in via RCA.