despite the most recent thread on MR front page about the Retina iMac coming, i am looking to buy an iMac right now this is the build i am looking at: 21.5" i5 2.7Ghz 8GB memory 1TB drive it's currently on sale at Best Buy for $1179. minus the $100 .edu discount it becomes $1,079. minus the 10% mover's coupon it becomes $927. i can get it tax free if i drive 35 mins to the Delaware Best Buy. is the above build for $927 worth it?