I've been lurking here for a while without ever posting and have learned quite a bit but I figured that it's time I ask a question or two. So I am definitely purchasing a MacBook in the next week or so and have no intentions of waiting so please don't advise me to just 'wait until Rev B'. ^_^ Anyway, my question is, how much difference does the 100 mb 7200 rpm HD make in actual performance over the 100 mb 5400 rpm HD? Because I've set a pre-tax upper limit of $2200 (+/- $20), this means I can either get the 1.83 GHz model with 1 gig of ram and the 5400 rpm drive... Or the 1.67 GHz model with 1 gig of ram and the 7200 rpm drive (with student discount of course). Basically, what would be the expected actual performance difference between a system with a slightly faster processor but slower HD and a system with a slightly slower processor but faster HD? Being a grad student in mathematics, I hardly use any video and photo editing software at a full-time professional scale. But I do quite a bit of mpeg-4 and h264 encoding as somewhat of a hobby and enjoy a few old PC games (i.e. Starcraft). That said, and penny-pinching not being an issue (between the two options mentioned above), which option would give me the better performance? Many thanx in advance!!