I'm looking to get the new 13" rMBP but I don't know if I should upgrade the processor or not? I'm using it for djing and music production (ableton/maschine etc.) I'm thinking about getting the 2.6ghz with 16gb ram, but I am also considering getting the 2.9ghz processor (with 8gb ram). thoughts on this? I do play some games but nothing too heavy, will the better processor make a difference to this? Cheers!