Hi I have a white macbook late 2007 and I'm thinking to replace it with the macbook pro 13", the basic model. I mainly use Aperture 3 working with raw files, and I'd like it to be more reactive, without any slowing down. Now with 4 giga of ram it's not so fluent. I saw in the activity monitor that page-out is about 1 giga, so I think I need more ram. Given that I would have 1066 ddr3 ram instead of 667 ddr2, and 2.4Ghz cpu instead of 2.2, what I have doubts on is: will I have real benefits buying the macbook pro? Or there will not be a significant performance? Thank you for your help!