I've been doing lots of research and narrowed my new work Mac down to a 27" iMac. I found 2 deals on the online Apple Store for refurbished 27" iMacs, both priced at $1699. They seem mostly identical, except for the processor (i7 vs i5) and video card. Here are my options: 2009 iMac 27" 2.8GHz Intel Core i7 (quad core) 1066MHz RAM ATI Radeon HD 4850 with 512MB of GDDR3 memory 2010 iMac 27" 2.8GHz Intel Core i5 (quad core) 1333MHz RAM ATI Radeon 5750 with 1GB of GDDR5 memory I do lots of work in Photoshop, Illustrator, InDesign, Aperture, Lightroom and play the occasional game of WoW and Starcraft II. Overall, which machine do you think is the better value? Is last year's 2.8 quad-core i7 iMac much faster than this year's 2.8 quad-core i5? And how much better is this year's ATI 5750 versus last year's 4850?