In just a few days, I will finally be retiring my White Macbook for a 13" Macbook Pro. I was wanting to know if someone can tell me just how much of a performance increase I will notice going from the below specs to the new machine. I'm getting the 2.53 GHz, 4GB of Ram, MacBook Pro. I'm coming from a White MacBook with a 2.0GHz Core2Duo, 4GB DDR2 Ram, and the Intel GMA 950 graphics chip. Specifically, how much of an increase do you think I'll notice from the faster processor and the 9400M graphics? I know there isn't just a specific number increase you can give, but any input would be greatly appreciated.