I am considering an upgrade to the latest Imac model, mainly because I can get it reasonably cheap (student-pricing), but as so many others have done before me, I come here asking for your advice. The main reason for upgrading would be getting twice as much GPU for gaming. Right now I have the 2009 model with I5 2,66 Ghz and the 512 MB GPU and 4 Gig RAM: I know, I know, I can get a great PC-gaming rigg for less but I love the Imac and want to keep going with it. So, all in all, do you think the slightly faster processor and new 1Gig GPU would be worth like.. 280 dollars for the increased gaming performance?