I currently have a 13in TB-MBP/512 8GB, after returning my nonTouchbar rMBP and my surface book. However, I want a bit more longevity out of my 13in, so I am thinking about maxing it out with 16gb and 1tb SSD. I love the form factor of the 13in, and the integrated iris graphics, but my issue is that I also have a iPad Pro 12.9in. The 15 in with 512gb/16gb 460 seems like the next logical choice, but I feel it will be over kill since I own a gaming computer and a 5k iMac. My use case will be web coding CSS/HTML PHP, XCODE, Photoshop and Magazine design. Light gaming, mostly on unreal 3 (although ark ran on iris 550). Should I stick with an upgraded 13in or migrate to the 15in?