Hello,I am a student who are studying foundation in University,and I am gonna to be an software engineer learner 1 years later. I have trouble about which iMac should I choice.There are 2 plans,one is 21.5-inch iMac with 3.1GHz Core i7 & 16GB Memory & 1 TBFusion Drive & GT650M.The second is 27-inch high configuration iMac. I am not sure what hardware I will need in the future but now sometime I will play game like Counter-Strike:Global Offensive,Dota2,Left 4 Dead,CoD,BattleField 3. So can you help me about it?By the way,the normal 27-inch high configuration iMac doesn't have Fusion Drive,what will it affect iMac except loading time? Thanks.