Looking to buy a macbook for music production (not live performance) and browsing. So I'm thinking, is the 13" rMBP (256GB configured with either 2.7 or 2.9GHz i5 and 16GB of RAM) good enough to use for Logic Pro X? I know it doesn't have a quadcore like the 15", but I'm looking for something fairly portable. For instance, how many instrument tracks can it handle? Does it get hot/noisy under moderate load? Is screen estate big enough? etc. Keep in mind that I will try to only use the instruments/effects that are included in LPX.