Hello friends, I'm about to buy a new MBPr, and I was wondering if the difference between the 2.4/2.6 i5s and the 2.8ghz i7 is large, in terms of computation. I am not buying the laptop for consistent hard work but I am looking to use MATLAB extensively on it. Casual gaming would also be lovely. (only indie titles) but I was wondering if you guys have any recommendations to make about what would suit my needs. Thanks very much, Chouhen.