Good Suggestions for Tube Amps under 6k

J.Chip,

You are right, and I agree that, for some reason, a few have treated the PL like it was a printed board, cheaply designed amp.  I chose it for its great reputation, reviews, user following, and quality build. That's why exploring other sounds/amps isn't something I would do based on deep dissatisfaction. As I wrote earlier in this thread, my queries have been to explore positively what else lies beyond the PL level and budget, just curious if I could find other tube amps that might further enhance my setup and musical tastes.  

@auroravengeance It’s amazing we got 2 pages of replies without someone recommending either a Lab12, Line Magnetic, or Leben.

Take a closer read. I and another poster suggested Line Magnetic amplifiers. Truth is that their are numerous excellent choices in the OP’s given budget range. Folks have posted many fine amplifier options. I don’t know how one could declare any specific one of them unequivocally as the “best” amplifier.

Charles

Oh, for a demo where 8-10 highly touted tube amps between $4k -$10 were placed in a single room with reasonable acoustics, well-rated DAC, revealing speakers, and tubes recommended by creator / manufacturer for the event. We could listen and opine and choose!

I'll add that we must blind test them before revealing the brand or model. 😎

Ayon, Audiomat (I'm slightly biased owner of Audiomat), Audio Research and Octave. I owned or listened extensively those. Chose model appropriate for your speakers and room, with which I am not familiar with. 
Lampizator Atlantic (well, anything from them) is one of the best out there. Very quiet. High sensitivity speakers still need some power to keep the system as quiet. It would be a mortal sin to ruin that quietness of your DAC. Class A vs AB vs hybD, SET vs PP or integrated vs pre/power combo - all that pales in comparison of importance to match amp's output to your speakers, and your source to the preamp/integrated input.
It appears you have a good info from speaker manufacturer; why don't you ask Lampizator people?

Well, Lampizator sells their own amps... ($14k-18K per component and up) and probably recommends amps well beyond the given budget.