I'm running a 660 Ti with everything on medium (except meshes, which are on ultra) at 1920x1200. Gameplay is pretty locked in at 60, cutscenes can get pretty chuggy but not terrible. You should be fine.
@yadilie: I actually really liked the risk/reward element of the racer career. Banking a huge stash of SP feels really good (my highest is about 260k, lost a stash of 560k yesterday).
Burnout: Paradise was my favorite game ever (I sunk ~300h into that game), so I'll follow Criterion and Criterion-derived games as long as they're made. For all of the problems with this one, I still had a lot of fun. I've played this one for 17h, just finished the cop career after finishing the racer career last night.
And, for what it's worth, I loved Hot Pursuit, and the online of Most Wanted (because it scratched that Burnout itch).
@xanadu: I played through (most) of the PC version. It's deeply flawed, but I still had fun with it. It feels *rushed*, which makes some sense given what happened to the studio and the fact that they had to develop it for extra platforms. If they had another year, I bet the game would be amazing.