okay, here's the deal.. I've never had a mac before. I was looking at getting the new macbook pro 15" (lowest model, 2.53GHz) for $1599 with the basic specs: 2.53ghz Intel Core 2 Duo 4GB memory 250GB hard drive SD card slot Built-in 7-hour battery NVIDIA GeForce 9400M graphics the thing is, my school is clearancing the old macbook pros to make space for the new ones. they have the intermediate mbp (2.66GHz setup), which was originally $1999, for $1699. So.. instead of buying the low end NEW model for $1599, I can pay $100 more and get pretty much the same specs as the brand new 2.66GHz model 15". my question is this: other than the new battery, what is the main difference between the old macbook pro 15" 2.66GHz and the new one? what would you do in my situation? again, never owned a mac before so any help is much appreciated. thank you. sorry for the really long post.