Tinman2,
From you response, you could buy either:
HP Z2 Mini G3
http://www8.hp.com/us/en/hp-news/media-kits/2016/HP-Z2-Mini-launch.htmlOR
The Dell XPS Tower Special Edition (8930)
You will and add a suitable monitor of your choice.
The big difference is size. That is why I asked about what you wanted. Some professionals want the smallest possible thing that fits on their desktop. The HP model above fits that. But here are no options for adding anything inside.
Other people what a big box that allows the option of putting more stuff inside. Maybe a an extra hard drive or some kind of interface card for a special project.
Both are about the same price. But have good performance at a fair price. Bother companies have good support.
I recommend either Dell or HP base on personal experience.
Hope that is of some help.