Here are my thoughts after checking out the iMacs in person: I've been considering buying a new iMac for the last couple weeks. It's been awhile since I've had a desktop and a mac for that matter. So you could say that I'm in the market for a new machine. Whatever I buy though has to last me for at least 4 years, as I tend to hold onto my machines for a long time. After viewing both the 21.5" and 27" iMacs, I can definitely say that I prefer the size of the 21.5" machine. The 27" iMac just seems too large. I could probably get used to a 24" display, but 27" for me is just a little bit too big. It is such a shame that Apple doesn't offer the NVIDIA GeForce GTX 780M on the higher end 21.5" iMac model. I'm interested in completely maxing out my machine, but I'm not able to adjust the graphics card, unless I were to spring for the highest end 27" model. What a pity. The biggest surprise, was that I found the display somewhat grainy on the 21.5" model. Maybe I've just become accustomed to retina and very high resolution screens, but I noticed that text just wasn't sharp. The screen, while still good, I feel desperately needs a resolution bump. It doesn't even need to be retina, but a higher resolution option would be very welcome. Does anyone here feel that the iMacs could be updated before the holiday season? Perhaps with higher resolution displays or maybe even retina screens?