...If you're going to do lots of streaming, video editing/rendering, etc then go for FX-9590
There is really no reason for the FX-9590, other than to get your freak on ...
By that I mean those "special" engineered cooling solutions, from outside Rads during the winter ... or one guy at XS ran his loop through a 55-gallon barrel of snow :lol:
The -9590 will take a nice under-volt, though, and drop 70-80 watts. That will get you 4.7GHz or so at 1.36v --- but at load you are still pulling 270-280 watts total system.
Another guy over at XS put a huge radiator in his unheated garage during the winter and piped through the wall to get to it. I bet his wife loved that ...