How well does the PSP emulate PSX games? Namely RPG's and a few other random things. I've seen some YouTube videos of FF7, 8 and 9... and they seem to work rather well, but do you need to do a lot of fiddling around?

I know there are some decent games for PSP out, but I think I'd only get it if I could play most of my PSX games fairly well on it.

Otherwise, I may as well just get a DS so I can play the earlier FF games, FF3 and a few other RPG's around.