So right now I am working with my late 2006 Macbook Pro. 2.33 Core 2 Duo with 2 GB of RAM. More and more i find myself needing/wanting a new mbp for their power and much improved battery life. If i was to buy a base 15" mbp how much do you think i would be able to get out of it in 9 months if i were to sell it right before the next refresh? Thanks