>>51089569used 290 at the very least.
290x if you can spare.
cheapie 970 or decent 390 if you've got the cash
980 good power, bit high of a price
980 ti or Fury X if you've got money to burn
R9 nano if loadsahmoney and
>muh power consumptiontitan if faggot or expecting to run ANNs
SLI or crossfire down the line if you can work up to it
AMD has the upper hand in dx12, your gpu will get a massive boost in future games, while Nvidia will give you performance in dx11 and below for games out right now.