In the market for my 1st Apple laptop.....need a little help. Was looking at the MBA at first but looking at the weight/dimensions vs a macbook there's really not much difference. I'm thinkin it might just be more of a novelty? Would like to heae an unbiased opinion from someone that owns both....anyone? Battery life is one of my top priorities so it's not looking good for the MBA. That leads me to my next question....wtf is the difference between the MB and MBP?? Comparing the base 13" model of both, unless I'm missing something, the specs look identical. $200 more for the aluminum body?