I love my 27in iMac with the GTX680, but I would never buy it solely for gaming. If only Apple would have put a GTX680 in the 21.5in iMac with its lower resolution. If you like eye candy in your games, you might be disappointed playing at the native resolution on the 27in. I ended up building a small mini itx gaming machine with a GTX 780 to fulfill my needs that the GTX680 in the iMac just could not handle with all the settings cranked on ultra. If I could do it all over again, I would have bought a base model iMac along with a Windows rig just for gaming.