I have the Welborne Labs 300B Laurel II's with all the tweaks and I can say I like them a lot.
At another house I've listened to a different 300B (which I didn't care for that much), a Moondog 2A3 (which I loved) and a DRD 45, which seemed even a bit more musical (in the good sense of the word) than the 2A3.
Nonetheless, nothing seems able to pry these Laurels from my hands.
And a 300B (even a 45) is way powerful enough for khorns.
You will want to put several throw rugs down on the floor, you'll be spiking around 5-6K without them.
You will want to encourage wall reflections around the speakers, for 4-5 feet either side.
You will want to discourage wall reflections from the rear as much as possible.
Put your listening position where you can sit and turn your head to either speaker and be looking directly at the tweeter/squawker.
Enjoy, I know you will.