I'm trying to decide which 27" iMac to buy. I'm torn between getting the i5 processor and bumping up the RAM to 12gb myself. Or for about the same price, I can get the i7 model with 4gb. I'm thinking the i5 would be a better buy for me considering I want to use vmware with Windows 7 from time to time. And my MPB really struggles to run Windows 7 in vmware with only 4gb ram. Would do you experts say?