I'd highly recommend the Intel Xeon E3-1231 V3 for your uses. It will be a much less expensive solution considering it's current price of 252.00 plus not needing any additional cooling solution. This chip is the i7-4790k without integrated graphics, so it's 8 threads and single core performance are basically unmatched without moving up to an X series Intel chip.
You can also use a MUCH cheaper board with it at no loss of quality since overclocking is neither necessary nor possible. The ASUS H97-Plus is a good choice and supports AMD crossfireX up to X4 GPUs. It also supports M.2 if fast storage is desired. Overall you'd have a stronger performer, with much less thermal consideration and a way lower cost.
Another factor is the fact that the 9590, as you probably know, cannot be used with any but the highest tiered AM3+ boards, the cheapest of which is the Gigabyte UD5 at about 150 bucks. It's highly recommended though to use a Sabertooth or Crosshair board with those chips as the 225w TDP is an extreme stress on the motherboard. Just a thought, but when I move from my FX-8320@4.5Ghz it will absolutely be to an i7 or Xeon chip.