I'm planning to buy one of the new iMac and I want to game on it. I'll only be playing Blizzard games, SC2, D3 and WOW Cataclysm. Will the following configuration of the 21.5" do the job at high settings ? # 3.60GHz Intel Core i5 # 8GB 1333MHz DDR3 SDRAM - 4x2GB # 1TB Serial ATA Drive # ATI Radeon HD 5670 512MB GDDR3 SDRAM Would the 27" with the ATI Radeon HD 5750 with 1GB be much better ? To be honest I'm a bit concerned about the resolution of this one and it also feels too huge for my room and needs.