Please help me decide on the 21.5" vs 27" iMac. The only reasons I'm considering 27": gaming and bedroom TV replacement. I'm not sure if I should just get the 21.5" and go with PS4/TV for gaming. Concerns: Video/Movie Quality: I've heard some say fullscreen video looks crappy on 27" upscaled to 1440p. I assume it's noticeable at close distances (how much?), but what about several feet away at TV viewing length? Could I discern the upscaling compared to regular 1080p on 21.5"? What about blu-ray 1080p @ 1440p, is that a noticeable difference? Size: I'm coming from a 13" MBP, so to me the 27" is massive for normal uses. They'll be tons of wasted screen real estate, and I don't need two pages at once lol. If the 21" came with 780m GPU I probably wouldn't want 27" other than possibly a bedroom TV replacement. Gaming: I'm thinking if I get the 27" I could skip the PS4/Xbone/bedroom TV. The only games I'll be playing are BF4 & CoD Ghosts multiplayer. Seems the 27" is my only option here, right?