I apologize in advanced for posting on this since lots of people are asking similar questions. I feel that I have to because others are wondering for general reasons, while mine are specific... Im dissapointed (to say the least) that the 13" mbp was not updated with the new processor. I really want the portability and it sucks that they just made my decision tough. I will be using the laptop for music production, sometimes recording up to 13 channels at one time with a firewire interface. My questions is will the i5 (faster) processor make a difference for music production, or should I worry more about the hard drive and ram???? I would love to have the 13", because of its portability, but if the new processor on the 15'' will make a large difference, then that's what I'll get. Is there anyone here who can give some some much needed advice????? Thanks!