Neither. If you want a good racing game get GRID or DiRT 2 (basically a matter of rally or asphalt). Do yourself a favor and skip DiRT 3 though. As a hardcore fan of the series, it really really
If you want a good shooter that you don't already have (Cause Blops really isn't worth your money either) try Bioshock or Borderlands or The Orange Box. And they're all really old and cheap.