Hello: I am getting ready to purchase a new macbook and was curious to see if there are any upcoming updates that it would be worth the wait for. If there is no reason to expect any upcoming changes, I am going to just purchase another 15" MBP. I would love to purchase a 15" Air if Apple decides to make such a thing. Does anyone have any suggestions? The latest that I can wait is until March or so. I am using a PC in the meantime. Thanks!