Hi all I'm thinking about doing a deal in which I trade my 2011 MacBook Air base model(64gb 2gb ram) and my trusty white MacBook with intel core 2 duo and 5gb ram. In exchange I get a month old 2011 13" Pro with 8gb Ram and the rest is standard config, also I get 150 cash my way too. Is this a fair deal? Or should I take a step back from this? thanks.