So I'm tired of waiting for the new I-mac (delayed yet again) and figured i would just buy a laptop although i dont need the portability of one at all as it will never leave my desk (i have i-pads and 2 other lap tops) so should i buy the Air or the pro as they are the same price point (1 certain model) but the pro has better specs? What are the paying for on the Air? The size or how slim it is? Whats the big advantage? Any advice would be a great help! Thanks!