I spend my whole day driving around in a realistic looking / handling car, why would I want to come home and play a video game which just simulates the same thing!

The only thing that Forza 2 & Grand Tourismo have going for them is the realism. I got bored of Forza 2 on the 360 after about an hour of game play. My favorite racing game involves more driving skill - Collin McRea WRX. Any idiot can drive a street car - Rallying is where it takes some skill to get around the course.