so im getting a MacBook for music production solely, I'll be running logic, abletom and obviously pro tools. I'll be getting the quad i7 variant with 16gb of ram. With the MacBook that will be announced next Thursday it's haevily rumoured there will be no headphone jack, which wouldn't be a problem as a USB interface would sort that, but oh wait there are also apparently gonna be no standard USB ports either... should I get a 2015 or 2016 MacBook? How much better performance can I expect from the upcoming ones? How long would a 2015 MacBook last me?