Sounds pretty damn decent!
However, I would rethink the PSU you've chosen. Modern parts are really efficient and as such your build has absolutely no need for a 850 Watt PSU. It's a not a bad PSU but it doesn't particularly stand out, either. At 185AUD according to pcpartpicker it's not much of a bargain either.
You'll save some cash with a SeaSonic SSR-550RM. It's a semi-modular unit, but somewhat cheaper at 122AUD and its build quality has received quite a bit of praise. Lower wattage isn't an issue even if you overclock considerably.