I don't know why...but for racing fun...I'm addicted to Split Second. There aren't any "real" cars in it (although, the first car you have is eerily familiar to a car we all know and love
).
Check it out...it's not realistic...it's just a blast to play.
Hopefully getting GT5 in my stocking this year (aka, if I wasn't 100% sure it was coming...I'd already have it).
You can see the Camaro-esque car in this trailer.