Okay, so since ordering a 15" MBP (2.6 / 1TB / 460) I have been winding myself up, seeing if I made the right choice by not upgrading the CPU. Because the 2.6 is the lowest CPU on the 15" MBs, and I have maxed out out the hard drive (almost) and GPU, have I made a mistake with the CPU? Is the 2.6 i7 going to be pale in comparison to the other specs? Will the performance boost me far greater with 2.7 or 2.9? I have been looking at intel comparison charts and tbh don't understand most of the information there (it is quite extensive as you scroll down).