I'm thinking of buying an extra 4GB of RAM for my Mac as well as a 500GB 7200RPM hard drive. As a student, my uses include websurfing, watching and downloading HD video, Word and Keynote presentations, and similar tasks. Should I just stick with my current setup (see below)? Maybe I should take up gaming and photo editing Thanks! BTW...do these add-ons help resale value and can I use them in future MacBook models?