other then vrc...
ive played need for speed carbon, thats pretty awsome on the pc
make sure u get a xbox 360 controller with the usb connection at any game store, definatly worth it for the joystick. for me at least
DiRT is pretty sweet, if ur into rally/corr racing
sega rally revo is coming out soon, looks like a sweet rally game
oh and of course Need for speed ProStreet is comming out also, im sure it will be pretty good, although for some reason i think im gonna pass on it, too many fps games coming out that i need to buy
prostreet link, http://www.gametrailers.com/game/4873.html
oh and like volracer said, gtr2 and gt, i own those two, the closest ive found to grand turismo sofar on pc, i love grand turismo