Up to recently I was almost 99% sure to get 27" iMac in this config: but even though I think I will be very pleased with its very high resolution for some tasks I will have to switch to 1920*, and I've read numerous threads about the blur situation that would be happening then. I know it happens every time when running in no native res, but with the gap that big [2550 vs 1920] (I've never owned such a big monitor before, it'd be my first so I don't really have any experience) is it noticeably bigger? I mean, I know some people like overreacting esp. when discussing Apple products, but it really makes me wonder now...How is the "blur" pixelation or whatever people call it while gaming on non naive res 1920*? I know GTX 680 is quite powerful even though it's a notebook chip so it's presumably possible to play on the native res, but I'd like to save some frames if possible.. All this fuzz made me think again of 21.5" iMac, but then I got creeped out by the 512mb GT 650M. After seeing benchmarks and some youtube vids I see it's ok with today's games etc. but when buying a computer like this I'd like to be somewhat save for a couple of years... With 21" I'd go for: I won't be using it mainly for gaming, obviously. On a daily basis I work with high res photos in Photoshop, and I was just hoping to combine the great display Apple offers in the iMac with somewhat powerful specs to do some gaming after hours... What do you think? Thanks so much, and sorry for my chaotic message, I know I have got quite a few questions.