If you're a racing fan, this one is worth a look. (XBOX version)
I rented it this week and will be buying it after I have to return it. I think it sells for $30.00 new.
Very good graphics, sound and physics. Cars take damage that does affect performance. A little bit of a story-line that enhances gameplay, very unusual for a racing game.
So far I've raced Formula Fords, 68 Mustangs, 2000 Mustangs, Semi Trucks, stock-cars, Mercedes GT's, Jaguars, and a few others. You have the option of inside view, over the hood, through the windshield, or just the track in front of you. Looking through the windshield in the rain with the wiper going is cool, until you crack the windshield and can't see a thing lol.
Tracks range from road courses, city courses, super-speedway tri-ovals, off-road point to point, and rally cross. I've seen as many as 28 vehicles in the same race with no slowdown!
I haven't tried the online yet, but the single player is as addictive as GTurismo or Proj Gotham so far