I bought a HP z400 workstation and put a GTX1060 in there. Bought the HP refurbished and GTX1060 new.
Edit: Got a new monitor and hard drive for Christmas. Also I put two Antec 120mm fans in there, they are not mounted to anything but they don't cause problems.
I'm planning to upgrade my cpu, cooler, mobo, ram, ssd and psu. Probably going to but those parts to my old Compucase or Hec case to make a cool sleeper.