Hi there, I recently got a payment from a freelance web development thing that I was doing and I definitely want to buy a mbp. I have not decided yet if i'm going for the 15" or the 17" but most important I don't know WHEN to buy it. I dont want to buy it now and in a couple of month a new mbp to appear and leave my recently purchased model a mile behind. So what is the best time to buy a new mbp? How often does apple release new models for mbp?