I'm thinking of buying either new 21.5 iMac with configuring 3.6Ghz i5 with ati 5670 graphic card or Macbook Pro i7 with nvidia gt 330m I'm asking advice for gaming performance using iMac or Macbook pro. Which is more better(I think iMac with ati)? and is it significantly a lot better? I also wonder ati 5670 used in new iMac is desktop graphic card or mobile version?? Please compare and give me advice.