added the 7200 rpm drive, so far i am pretty happy. Really noticable on things like converting mp3 to aac (yah i know about the loss in quality which is why i keep all hq vbr on a drive with mad space- not my ipod) seemed to bump some game playing too..
haven't done anything too heavy, but so far it seems to have given a nice little boost.. no noticable diff in heat or sound when surfing, etc.. as i do some heavier stuff, i will let you know if you care...