Hello all, I'm currently debating which version of the macbook air to get. I know there have been some other threads on this, but it seems as though my situation might be a bit different. I'm going to be attending medical school next year and would like to get something a bit lighter to take around, since I currently have a 2008 macbook pro 15'' 2.4GHz c2d. I know that I wan't to get the 13'' but I'm not sure as to whether or not I should go w/ the "ultimate" configuration (2.14 GHz, 4gb ram, 256 gb hd) or the base configuration but with upgraded ram (1.86 GHz, 4 gb ram, and 128 gb hd). Realistically, I only have 53 gb of hd space being used on my current macbook pro so I probably don't need the 256 gig hd. I'm not so sure that I will really notice a difference between a 1.86 GHz processor and 2.14 GHz processor, as I don't think I really am doing any cpu intensive tasks. But do you think my computer will be better optimized to run microsoft office, aim, itunes, safari, mail, and calendar opened simultaneously with the 2.14 GHz processor. Those are the applications that I typically have running throughout the day. Also, I would like to buy something that will last for the next 4-5 years from a technology standpoint. I'm not sure as to whether or not applications that I will use in medical school will demand a more powerful processor or if my hd needs will be much greater in the future. Perhaps the faster processor will also be able to run OSX lion better as well? Lastly, the lower configuration that I have mentioned is approximately $400 dollars cheaper and would allow for me to purchase an external monitor, mini-display adaptor, and superdrive. Any opinions would be greatly appreciated.