I'd love to go for a GTX 980 but price... I'd have to scour some used sites to find a good deal. Also the AMD 390 is really tempting for it's 8GB of VRAM. But from what I've read in reviews is that extra VRAM is only good if you're playing in 4K. I'm at 1080p but that could change in the next year with the falling prices of 4K displays.
Yup, that's exactly the mentality I had when I built this computer. It has a 730W PSU. So I should be able to add virtually any card without blowing it up.
The stock clock is 2.66 GHz, I overclocked it to 3.5. With the aftermarket cooler, I was able to clock it up to 4.0 GHz and temperatures were fine. However it would crash after a few minutes of playing GTA:V. I could probably push it to 3.7, and wouldn't mind if it broke since I've got 6 years out of this CPU.
Good advice, I will do some research into these new cards! A few months ago I was reading an article about HBM memory for video cards and was wondering when the next generation of cards would be released.