Hi all, Sorry that should say entry I5 against 3.1 I5. Thinking of taking the plunge and buying my first iMac. It will be used for lightroom and some light Photoshop use. We'll be going for the 27" model and I'm looking at an entry I5. The question I have is would I be able to upgrade the CPU in a couple of years and if yes would I have more upgrade options in the future if I buy an entry I5 rather than an 3.1I5 or even an I7 now? New to Macs but have built enough PC's with future proofing built in by buying the right motherboard and CPU family and am interested in doing similar with an iMac. Thanks for the help.