I sold my mid-2009 15" MBP to try out better speced PC laptops and have been in limbo since mid-May. It is too late to get it back, and I would like to own another 15". The problem is that I was only able to sell the MBP for about $900, so that makes buying the 13" a better idea financially speaking. Are there any differences between the size of the trackpads for the 13" and 15" MBP? If there isn't, I'll probably just go with the 13".