(Anyone have old MBA 11" and upgraded to new MBA 11"?) I bought the MacBook Air 11" Ultimate when it first came out. I love the size, weight and battery life. The only issue I've had, and it's small, is the letter "A" on the keyboard has begun to chip away (almost like the paint has been chipped off). My primary use for this machine is for work: browser, Office, iTunes, Quickbooks and I'll have a Twitter app on. These are all low processing programs, so it's not like I'm running programs that slow my machine down. I do however use PhotoShop off and on and it's very slow. Another reason I'm looking at this is because I want to run Windows 7 (have to for work). I've heard he's easier to do this work the newer MBA. I know the newer MBA 11" is much faster than the original MBA 11". Is there anyone has had the old one and upgraded? Reasons and was it worth it? Also, if you upgraded from the 11" to the 13" please chime in. Appreciate the feedback.