Anyone of these, http://www.dell.com/en-us/work/shop/7000-series/7920/spd/precision-7920-workstation?stacks=true or go to the lower end systems. Once you spec them with anything over 4 cores, it states it requires a special version that costs 105 more.
I am going with the Dell XPS systems, we have a decent size render farm and our Video/3D guys currently have 4 core 8 thread xeons at 3.5 ghz. So it is a good step up to a 6c12t 4.6ghz CPU with a GTX 1080.
I just wanted to ask about the whole Core count limited versions of windows 10. It seemed like a lot of BS on their side, the Dell rep said they couldn't tell me anything about the OS because it was only on an internal document they couldn't share with customers.
Basically we just do a lot of Photoshop, Animate, Videos, 3D Modeling/Animation, and Unity Development. So nothing critical of a Xeon or Quadro card. Nothing that's worth 200% more in price.