I've had my 2010 15" MacBook Pro for around nine months (see specs in my signature). It has served me well in that time and I have kept it in excellent condition. However, I'm considering selling it in order to buy a 2011 MacBook Air 13" and Apple Thunderbolt Display. I don't do high-end gaming or intense video work. From what I've seen, a new MBA would be just as fast as my current MBP. I'd be able to carry the MBA to school more easily and I'd have a larger screen to work on at home. In order to save money I'd buy the MBA and TB Display as Apple refurbished (saves about 15%) Here are my intended costs: +$1700 for used MBP +$100 for used HDTV (TB Display would replace it) -$1520 for MBA (tax included) -$890 for TB Display (tax included) -$100 in accessory costs = -$710 So, based on my best estimates the transaction would leave me $710 worse off. Based on this information, do you think it's worthwhile to sell my existing MacBook Pro and buy a MacBook Air and Thunderbolt Display?