I'm going to get the Retina display MacBook Pro for college, and I need some advice on how to spend my money. What I need: Computer to last me at least four years without getting -too- slow I was going to get the 2.3ghz with 16gb memory or the 2.6ghz with 8gb memory. It's hard for me to justify ponying up $2,600 for the latter, but if that's what it takes to make my computer run tip top for at least four years, I'm willing to do it. Or do I even need to? Will the 2.3 with 16gb last if I'm just writing papers, doing research, and searching the web? Thanks so much for the input!