I am considering upgrading from my late 2009 i7 2.8 ghz w/ 2TB hdd and getting a Retuna iMac. I have some concerns about getting another iMac generally because of the cost and difficulty of making repairs/upgrades in the future, but that is probably for a different post. Assuming I do decide to go with another iMac, I was wondering if the base Retina (or possibly a Retina and adding a 3TB fusion drive) would make a big difference, or if I really should go with another i7. I generally keep my computers for quite some time, ultimately passing it on to my wife who uses computers primarily for web and email. I use the computer for work (documents/text), Lightroom photo editing (perhaps to include Photoshop and/or other various editing plugins in the future), some recording with Garage Band (not too many tracks usually), as a server to stream music wirelessly, web, email, etc. Less often, but other things that I do from time to time might include ripping Music CDs or Movies, light video editing with something like iMovie, etc. Thanks for thoughts.