If you have a PS3 and want real cars then get Gran Tourismo 5 Prologue. It's cheap (you can even download it from the PS store and as real as it gets in terms of driving physics, although not in terms of damage put I could personally care less about that. Lots of people like GRiD as well, I wasn't so crazy about it. All the racing on the Wii I've seen is really more arcade than realistic.