I own a 2.16ghz, 2gb ram, 120gb HD Macbook Pro that I bought Christmas 2006. It runs great but signs of slowing down are beginning to show. I am considering selling it on ebay to get some $$$ towards the update. Just curious about the capabilities of this new chip that we might get compared to the core 2 duo. I know my way around a computer but not when talking about computer chips and all that stuff. Will a new MBP 15' update base model really seem like a huge difference compared to the current model i have now?