So, impulse bought a refurb 2010 i7 iMac last week, my first Apple aside from my iPhone. Received it, and it has pretty bad screen yellowing on the bottom third. So, called in a return and ended up ordering a 2011 i7 refurb. Received it today, and well, not impressed. Colour temperature across the display is not consistent, shadow bar above the dock all the way across the screen, and while it's sitting right next to the 2010, it is not nearly as bright or vibrant. Just looks muddy. And yes, I notice these things on both machines without staring at test bars. It would drive me nuts in day-to-day use. May as well light a stack of bills on fire in front of me. Running out of time and energy to deal with this. I would buy it in-store, if only Apple would cough up the $300 difference for the 2011 i7. I've thrown some pics up, hard to photograph in any useful fashion. Sorry, some of the images are upside down. Ignore the red/greenish hues, that's just the iPhone camera talking. Beginning to think this was the wrong decision, even though I enjoy using it.