I am grabbing a 15" from the refurb store for my son. He is a 2nd year college student, and it's time to upgrade his 13" (2011) MBP. Questions: Does the processor matter all that much? the 2015's are all available. Looking at a 1tb, with the dedicated graphic card. He is: A computer science major/music double major. Video production as well. Will be using for: Adobe suites Final cut pro x Logic Pro x Ableton suite He will be rendering film, 4k, and using external drives for media. Can anyone advise on what would be my best option? Appreciate the assistance!