Hi there, I'm a working musician and am frequently traveling and so portability is a big deal to me...however...so is power because I need to use heavy music apps like Logic, Reason, Ableton, etc. Also, I'm currently running a 2009 MBP and REALLY would like to move to a retina screen. Do you guys think the new 12" rMB will run those apps well? Or will I need to the power of the 13" rMBP? Thanks for your thoughts/opinions!