Pricing almost works going with nVidia.
A GTX 980 would give you very comparable performance, and runs around the same $380 pricepoint (for the absolute cheapest model)
https://pcpartpicker.com/product/LycMnQ/gigabyte-video-card-gvn980wf3oc4gd
A GTX 1070 would perform better, but run a little more expensive - $420
https://pcpartpicker.com/product/YpH48d/gigabyte-geforce-gtx-1070-8gb-g1-gaming-video-card-gv-n1070g1-gaming-8gd