For what it’s worth, NVIDIA’s benchmarks for the 980 vs. their 1060 is very comparable:
http://www.geforce.com/whats-new/articles/nvidia-geforce-gtx-1060
Scroll down to the bar-charts, it’s basically a wash, although the 980 draws something like 45 more Watts power.
Anybody have a price out for a custom build with the same components? Not motivated enough to pcpartpicker this one.