I recently bought a ThinkPad P52 with the Quadro P2000 card. It has been great so far. Rendering is shockingly fast even with the mid grade P2000 card. The only minor regret I have is that I bought the 1080 screen because I often work with my Dell Ultrasharp monitor. I do a lot of video editing and the 1080 is less color accurate than the 4k and I do find myself out on site wondering about color and not wanting to do any correcting and grading on the road.
If that isn’t an issue, then the Thinkpad P52 is the answer, in my opinion.
