Hi! I currently use a macbook pro, but it's getting on at 3 years old now, I never use it as a portable device and I'm desperate for a more powerful iMac. In terms of performance I need something that can play the latest games - WoW and CoD specifically - as smoothly as possible. At the moment I'm drawn between the better 21.5" mac, or the 27" with the same settings. 1st Question: I'm fairly sure the 21.5" would play the games well, but if I upgraded to a 27" screen, would the games play slower as a result? 2nd Question: The 21.5" iMac comes with an i3 processor. Is there a big difference between the i3 and i5 in terms of performance (specifically, again, for gaming). Would it be worth getting the i5? Thanks in advance!