My uses are Web Browsing, iTunes, Mac App Store, iPhoto, messing around in Garageband, and maybe some codeblocks. I was debating whether the entry level is powerful enough. I have an i7 gaming rig that I never use as I found it a waste of money and overkill. Would I be able to tell a difference in speed in the tasks I plan to do with the top of the line 27" model? I am a college student so it would be nice if I didn't have to blow 3 grand, but I don't want a decline in performance. Do I need an i7 cpu with what I plan to do? Thanks!