Hi, my 24" 2007 iMac seems to have met it's doom. I am tossing around the idea of get a mac Mini, but think iMac is the way to go. I was still semi happy with the performance of my 24" iMac but it was slowing a bit working through my larger photo library. Also, the 4Gb RAM and running a Windows Virtual Machine through Virtual Box was getting a bit slow. I noticed they sometimes have a 2011 iMac 27" in the Refurb store for 1129. By comparison, the 2012 is 1399 and the 2013 is 1549. it seems the best deal might be the 2012 for $1399. I also have to think about Tax and AppleCare. Is the performance bump between '12 and '13 noticeable? My most intensive thing I do is photo editing using iPhoto and Aperture. Maybe I'll switch to lightroom at some point. I'd like to get a good 6-7 years out of this thing. I was told the 2011 iMacs get a LOT hotter and they have fixed that with the newer models. I will upgrade the RAM on my own.