Spending another 100$ you can get an i7 6700 which gets you Hyperthreading, which effectively means 50% additional performance for CPU-bound 3D modelling and animation tasks. I REALLY recommend this as it will significantly boost export times and such.
The GTX 1060 will perform really well in games and will be a great help in CAD applications that support GPU hardware acceleration.
Another option ONLY if build is more modeling less gaming would be an 8350/x990 setup. Will definitely hurt gaming performance but will do the 3d work a good bit better than an i5 6500
Not really. At this point the FX 8-cores are practically on-par with modern i5s. They also put out a lot more heat and don't have access to newer technologies (e.g. DDR4 memory which is the new standard). A Zen CPU might be a good option when they come out, but right now the FX 8 cores are only better options for 3D work compared to an i3, not an i5.