Hi. I have a 12" powerbook with a 1.33 Ghz G4 processor. i was going to get a brand new macbook because i want a faster system with a little more HD space but even if I spent no money on anything else (including food), I wouldn't have enough money for a new system for another 3-4 months. (that's not really an option here. food is good.) I was just wondering what brand of new HD you'd recommend and what the biggest size i could get for my system is. any help would be nice!