Here's a question I never see discussed or brought up...but why exactly is the Air capable of 30 days standby battery life but the Macbook Pro isn't? Is this another one of Apple's arbritrary differentiators for the sake of setting products apart from one another or is there a proper explanation for it? Does the more beefy processor somehow influence standby power consumption? I find that I realistically use my laptop intermittently throughout the day, so it's being put to sleep quite often. With the Pro I just bought (late 2011) that results in a lot of wasted battery life with the thing not even being used. It's one of the biggest factors I was considering prior to the purchase, and still can't decide whether it's substantial enough of a difference for me to care. I have a 120 GB SSD installed in the macbook pro, so as far as the hdd space goes, I have what is essentially equivalent to an Air anyways. Is it justified to keep the Pro for that extra processor speed if I'm not using the computer for anything crazy? My reasoning was: 1. Upgradability, including possibly going the Opti-bay route http://www.mcetech.com/optibay/ (which I realize will degrade battery life even further) 2. IF i were to ever need the processing power, it would be nice to have it Question is, are those factors worth sacrificing the Air's standby battery life and size? What are your thoughts?