I'm a teacher, and now that the 12" PB has dropped into the iBook range ($1499), I'm considering getting it (with $200 savings on the iPod combo most likely). My question is this: Should I get it with the 40GB drive? How big a third party drive will work in the PB 12"? If 60GB is the limit, I'll buy that from Apple, but if I can put in a 120MB+ drive in, I'll buy the machine stock (40GB) and replace the drive myself. (I've added larger drives to a PB before). I won't even bother asking about RAM as Apple's RAM is expensive.