Unfortunately there are many possibilities and opinions on what hardware is best for a given application. Much will depend on your priorities, POV, etc.
As far as RAM freequency, either 1600 or 1866 MHz. is fine as tests show these are not a system bottleneck on a desktop CPU. The higher frequency RAM is just for entertainment value and a poor value. Make sure that you purchase ONE single RAM kit of 32GB as multiple RAM kits to achieve the 32GB total may not function well or at the specified RAM timings. Speaking of RAM timings, neither they nor frequency mean much in system performance once you reach 1600 MHz. so buy whatever meets your budget/interest. Back in the days of DDR/DDR2 timings and frequency were quite important but not with DDR3 running @ 1600 MHz. or higher.
As far as PSUs are concerned you will probably find that a Seasonic brand model is as good and as cheap as any available unless you can find a re-labeled Seasonic on sale for a better price. The prices on bronze vs. silver vs. gold do not vary much. Depending on the cost of electricity where you live and the amount of PC use you have, a "gold" model may be a better value, long term.
Unless you have some burning desire to get involved with H2O cooling and deal with the PC hardware damage liability from water leaks, I'd suggest a good quality tower HSF like the Aegir SD128264, which never leaks and can handle an OC'd FX-8350 running @ 4.7+ GHz. 24/7.
As far as mobos go Asrock, Asus and Gigabyte all produce good mobos. Unless your heart is set on the Asus for some reason the Asrock Extreme 9 is a better mobo, (at a lower price, IME), - depending on where you live. If you can find an Asrock 990FX Fatality around at a good price, it is also a very fine AM3+ mobo at a better price.
03:46 AM by