[rooze]

Allnic Audio A6000 if you can find a pair. These will put out 60w running the 300b xls tubes and are sweet sounding with plenty of muscle.

[opnly bafld]

I suspect builders will say AC heating are better cause are simpler, use less parts, but if the user have a hi sensitivity speaker he maybe prefer DC. 
Thats heating DC regulators boards also impacts negatively the sound.

 

I suspect the only thing you have right is "if the user have a hi sensitivity speaker he maybe prefer DC".

[richidoo]

Best 300B amps I've heard are Border Patrol.

[Delta77]

I’ll throw one more in the ring..

I have little experience beyond my own system..

I have 2 tube amps in rotation a Decware “ZMA”, and a Aric Audio “Super 300B”..
I like them both , but I would probably give the edge to the Aric Audio..
Priced similar around the $6,000 mark.. Both hand made by a boutique company..
On my Tektons (94db-?) both seem to have about the same power output..

Good luck in your search.,

[mresseguie]

Wow. I've got my homework now. Many thanks for all your suggestions. I will look into all of them. PAF begins tomorrow, and my ears will be open to what's available there.

Thank you.