So I return to Uni in October (Video games design) and I am thinking about going after an iMac using my student discount. The 2 options for me are... the 3.2ghz 21" model or the 27" model....however I was thinking maybe to just go for the 21" model then update the processor to the i5. What do you guys think? im worried that that because the 27inch is displaying more pixels its going to make graphic intense programs/games run choppy... And one last question.. how much of a performance increase do you think will be felt the HD 5670 over my current MBP 9600M ? Thanks for your time.