I currently got a GTX 960. I guess its getting a bit slow. And also i cant play every game. Games like League of Legends or CS:GO are fine and maxed out. But later games like Witcher 3 are just on 40 fps at medium settings. And the new Polaris graphics card are pretty good. And then i could buy a new monitor for the polaris card instead of a new graphics card. The new monitors from AMDare awesome.
Good Luck for everyone