I am a computational biology student who wants to purchase a macbook. I do moderate programming stuff (mathematica, matlab, maple, R statistical computing, c++, java, python and lisp) and some graphics (photoshop, imageJ etc). These are modest uses and not very high end like professional coders or image editing. what configuration would you guys suggest for the macbook. my budget is around $ 1500 (with educational discount). of course i can go upwards max upto 2 grand if the deal is great. but preference is around 1.5 grand. specifically, 1. is there a perceptible difference in performance for the above requirements between a 2.16 ghz and a 2gz chip 2. is a 2 gig ram sufficient? 3. has anyone made a dual boot system with mac tiger and kubuntu/suse linux 4. i keep getting mixed reviews about refurbished systems. any advice specifically for the type of job i will be doing (as mentioned above). 5. am i right in understanding that 2 gig is the max ram possible for C2D macbooks out int he market right now. (i.e. even if I buy ram 2x2 gigs later, i CANNOT upgrade my system. i expect the notebook to last for 3-4 years till my thesis is done. your inputs are greatly appreciated.