I'm sure this thread is overdone but any advice will be greatly appreciated. I currently have a Dell XPS M1530 with 2.5 GHz core 2 duo, NVIDA 8600 (I'm pretty sure), 4GB Ram, & 250 GB of RAM. Should I get the baseline MBP or should I get the 2.53 GHz one? How much faster is the i5? I know how fast a Mac is so I know any new MBP I get will be significantly faster than my current laptop but I want to know which one would be worth it.