hi pkmusic,
I’m in the middle of my new server build, I ended up going with the anniversary 8086K -
( which is about halfway between your two cpu options ).
I’ve had to turn off hyper-threading in the bios so that C9.5 runs smoother.
I’m running the cpu’s at around 4.5 GHZ, with water cooling, and I reckon it can easily go to 4.8 and still be a dead-silent system.
good luck with your build.