I'm a college student, and I will be upgrading from my iBook G4. Yes I know any upgrade will be significant. But I would like some advice. Should I got with the 2.53GHz i5 or the 2.66 i7. I will be using for the everyday stuff, email, web, etc. Also, Matlab and some games. Plus any new software that will assist in my engineering career. I plan on keeping this one for AT LEAST 2-3 years. Unless there is a huge update in the future that has something I need. Then I'll go the eBay route and it won't really matter. But in your opinion, what should I go for. Thanks for reading and sorry if you feel my post is a duplicate or "stupid". $2000 is just a lot money to spend.