I was wondering if some of you could help me out when it comes to gaming. I am thinking I will buy a new refurbished iMac with the 5670 video card, however, I am split on what size I should get.

Obviously, with the 21.5", I get the 1920 x 1080 resolution which would put less of a load on the video card which would equal more FPS per second. Despite this, I really want the bigger screen - the 27" because...well, the screen is just amazing.