My answer is, that Fury/FuryX is dead in the water and a waste of money due to the 4GB frame buffer, which isn't enough for a high end card these days. Because of the 4GB framebuffer, you're going to run into issues when using the highest grade of textures in games like Deus Ex MD, or even Gears of War 4. There'll be lots more stuttering due to frame time spikes because of texture swapping. Here's an example of what I'm talking about:
For most of the video, the Fury X actually does quite well because most of the scenes are stationary. But once the reviewer goes to Prague and starts moving around the city, then you begin to see the limitations of the 4GB framebuffer. The FuryX has some very bad frame time spikes, whilst the 980 Ti and the 1080 have a smooth and very consistent frame time variance..
So basically, the only card worth upgrading to right now is the GTX 1070. If you shop around, you can get some really good bargains..