Building a workstation for $700- $800.

Hello everyone, I am planning to build a \$700-\$800 workstation and I am having trouble finalizing on a GPU.

Here is my list so far:

http://pcpartpicker.com/p/1JE9d

I plan to use this workstation for video editing with Adobe premiere as well. Any suggestions?? (I don't mind going a little over budget)

SolidworksAdministration