Hi guys, I'm looking at getting either a 12 inch or 15 inch powerbook. I'm currently looking at 2 options: Used 1.33ghz 15 inch powerbook, 512 ram, 60gb HD for 1450+shipping or Used 1.33ghz 12 inch powerbook, 768 ram, 60gb HD + extras like BT keyboard, stand, etc for 1450+shipping or Refurb 12 inch models for around 1300+tax Basically, I'm hoping to spend under 1500 (as always, the more economical, the better). I'm a bioengineering graduate student in and do/will be doing a fair amount of raw data processing. I'm not terribly concerned with the processing power of the powerbook since it doesn't compare to my dual 2.0ghz at home or the supercomputer time I have available. I'd just like to use it for paper writing, quick prototyping and especially to carry between my lab and the medical campus. So I'd like to ask you guys, is the 15 inch worth its weight, excluding the niceties of hot swappable battery, etc. I've been to the store and spent significant amounts of time trying both models out but I can't really get a feel for whether or not the 12 inch screen is too constricting. Also, is it really worth getting the 15 inch if I'm just going to sync up my files at home and use my dual 2.0? Thanks for your input.