I am taking up a course in Industrial Design, so I will be getting a new laptop for school. I am set on a 15-inch MBP w/ RD, but I am stuck on which spec upgrade(s) to get. Keep in mind I am just a student so I can't max everything out, but I still want something rather future-proof for the entire four years of my course at least. My course is going to involve things like 2D & 3D rendering with Adobe, AutoCAD suite of applications, amongst others. In my case, would a CPU or RAM upgrade be more worthwhile?