An RX 480 4gb is an the best price ratio card out there, however, at 200$ only.
I am an owner of a EVGA FTW 1080 GTX and I am not impress by that card. My initial unit failed in less than 2 months. There is numerous display problems at 4k resolution and Windows 10 instability is not helping either. it is a nightmare I was not dealing with my 290x in CF.
Not to mention numerous crash if I don't use the Nvidia experience program to launch my games or when I close a game application. The whole joke about AMD drivers to be worst is just a stupid fanboy argument. I never had so much problems with a card that I know is related to its architecture and not the brand of the supplier.
If Vega is 20% faster, I am getting rid of my 1080 GTX.