I've heard macs retain much of their value even after several months of use. I'm desperate to get off of this old Dell, and I'm eying a cheap 13", but I don't want to give up on a 15" with Arrandale. Does anyone have experience selling a recently outdated model after a refresh? Is it reasonable to think I might get 1000k+ for a 13" after Apple updates the product line? Does it make sense to get a higher-end 13" to increase its long-term resell value? (250g 2.53 4gRAM or something like that). thanks for any advice.