So, my choices are limited, being from a third world country. I don't want to get the 2017 15 inch if the performance isn't going to suffer too much. I'm considering a used 2015 15 inch with a 1TB SSD, R9 m370x or perhaps even a brand new 13 inch 2017 model. I want the performance to be at least equal to my current setup which is i7 4770, 512 Samsung EVO 850, R9 270X and 8GB of DDR3 RAM. I'll be connecting the MacBook to a Dell U2715H which doesn't have thunderbolt/USB C and possibly another 27 inch monitor. What is my best option here? I'll be mainly using it with Adobe CC programs, along with Framer, Principle, Invision Studio. No Gaming, occasional video edit, but not a primary concern.