I am thinking about upgrading from my current machine (Aluminum 2008 Macbook Pro) to a new 2.3 i5 13 inch macbook pro. I know that I will be going from a larger screen to a smaller screen but I have played with it in the store and I really don't think I am going to mind. I also know that my current machine has a dedicated graphics card and that my new machine will not. Ultimately what I would like to know from members of the community is whether or not there will be a substantial speed increase on the new machine versus my old machine. I have googled repeatedly trying to find some type of benchmark test but almost everything out there compares the new machine to the previous model and of course mine is several generations behind. Any thoughts would be appreciated.