Personally, I took a leap of faith and I ordered the new Alienware 15, because 50 % of my time I do Film editing with color grading and graphics heavy things (so the nvidia 10 70 should be useful) and 50% of my time I do development (Kubernetes,...) so the 32gb of RAM come in handy. Plus it has NVMe, 4k screen,HDMI 2 + DP, TB3,... it check a lot of your boxes. I considered the Thinkpad P50 and the HP Zbook 15 but I found the GPU to be a bit weak. Plus I heard many issues with the HDMI 1.4 on these machines.