SORRY FOR THE GENERIC POST!!! You're all sick of it by now but I call upon the masters for advice! I'm looking at buying the base 27' i3 imac for $1699... Haven't seen any threads on this particular model or any videos about it's performance. As my signature suggests, I already have a 2.53 Intel Core 2 Duo MBP and was wondering if the speed increase would be substantial for an upgrade or should I keep saving away for the i7! (If I were to save up, I would forgo the i5(maybe)) Any help would be greatly appreciated!