I just ordered the 27 inch iMac with the 2.9 GHZ Core i5 CPU and a 1tb Fusion Drive. I ordered 32 GB of ram from Crucial. Should I have opted for the Core i7? I dont do any major video editing or anything like that. I have a very large iTunes catalog which is connect by a WD My Studio Mirror Edition drive which I will upgrade soon also.
I now have a 2010 iMac with the Core i3 so I think I will still see a nice improvement.