Looking for agood racing game

For the ps3 or xbox360. I looking for a new racing game to play I reaaly liked NFS:underground 2 and Carbon was a step down but still ok. I'm looking for something along those lines, wasn't really into Gran Tourismo to much gear head tweeking you had to do to your car for my taste. So basically a game with good freeroam as well as races, and on that truely lets you pimp your car not just give it a shinny coat of paint. Police in free roam would be a plus, I did like that from Carbon. So can anyone recomend something along those lines or something close I can look into?

Have you tried Forza Motorsport? You could take your time to modif the car in that game. The paint is also interesting with free style painting, so u can write ur name or whatever on your car, as a decal.

But still i prefer rally game, Dirt 2 is the best! Give it a try!