Hi. Currently I have an iMac 27 i7 which I love. However I have an opportunity to get a Mac Pro 2.8 Ghz Octa for a pretty good price. I'm wondering if this is worth me switching over? One thing is I have an external drive that I use for my data files and getting the mac pro would mean I can add additional drives. I guess what it boils down to is how is the i7 chip compare to the 2.8 Octa? I do mainly CS5 and LR (photography) and on occasion I do switch into windows to do work. Getting the MacPro would mean I have to buy a comparible size monitor. thoughts?