That sucks! Thanks!
Would one of those 750 Ti or whatnot work ok?
I believe Astra.Xtreme was correct, the equivalent GPU for the Xbox One is something around a 7770 GHz Edition/7790.
The NVIDIA equivalent to the 7790 is a GTX 560 (no longer sold), 650 Ti (no longer sold) or 750 (around $300).