I'm waiting for iMac 2012 just like many others and trying hard to do my research on what should I get if Apple keeps procrastinating on desktop front. Here is interesting article I found on Ivy Bridge v/s Sandy Bridge performance. http://www.itproportal.com/2012/06/12/ivy-bridge-vs-sandy-bridge/ "4. Ivy Bridge is faster - but just a little. Performance generally improves more between "ticks" and "tocks" than between "tocks" and "ticks," and you can see this in the relationship between Sandy Bridge and Ivy Bridge. In our testing, for example, an Intel Core i7-3770K Ivy Bridge processor earned a score of 1.65 in our CineBench R11.5 multicore rendering test, compared with a Core i7-2700K (the fastest Sandy Bridge chip) in the same system earning 1.58. The chips' scores in PCMark 7 (3,679 versus 3,867) and times in Adobe Photoshop CS5 (2 minutes 47 seconds versus 2:50) and Handbrake 0.9.6 (32 seconds versus 31 seconds) also bear this out. So you will see speed bumps, but they'll be small this time around. Chances are, however, that next year's "tock" will boost the speeds of new processors considerably more. " Based upon this it looks like in a normal use we wont even notice any performance difference between two processors. I'm just trying to figure out if I should get 2012 MBP 13" with i7 processor (MD102LL/A) or wait for 2012 iMac or I should get refurbished 27" iMac 2011 as it is going for good price on Apple store. My use is going to be for Lr4 + CS6 for photo editing and Aperture for creating slideshows and iMovie for movie editing. My current MBP is 2010 13" Core2Duo model with 256GB SSD + 8GB RAM connected to DELL 21" IPS panel. What is processor performance difference between i7 processor in MBP v/s i7 processor in iMAC 2011 ?