class amp dilemma to match with Pure Audio Project Horns should I see an audio-astrologer?

@whyrichard 

I had the PrimaLuna EVO 400 pre, amp and the PrimaLuna Dac a couple years ago, that was with the Klipsch Forte IVs, it didn’t work out. The PrimaLuna after a year started to eat power tubes and blowing fuses, I replaced the PrimaLuna tubes and sold all three pieces and never been so happy to leave tubes behind and I never was happy with the sound maybe 75% even after going down the tube rabbit hole. Next and what I have now is Pass Labs preamp, the XA-25 and and the Sit-4 and that’s definitely giving me everything and no worries if everything is going to turn on and play all day. I got rid of the Klipsch speakers and 100% happy with my Volti Lucera speakers, I have been going back and forth with the Sit-4 and XA-25 in my system,I am sorry to say but the XA-25 has won the Sit-4 is out of my system and I have it for sale if someone in my area the Pacific Northwest of Washington state wants  it come on over and get it. If you like tubes keep what you have other tube amps won’t make you happy get the XA-25 before you go down the more tube rabbit hole, the XA-25 doesn’t get very hot sounds glorious..that’s my 2 cents worth lol

Meinter MA3i dac, Pass Labs XP-12 pre,Pass Labs XA-25 amp, First Watt Sit-4, Volti Lucera speakers..

tube amps never again…

My question for you all, considering my high-efficiency horn speakers, small room, and leaning towards acoustic instrumentation, with this amp, most likely be the most heavenly for me?

@whyrichard 

If on a budget look into the Dynaco ST35. If its an older one make sure its sorted out properly. They can be surprisingly musical, even to people that really like SETs. 

I've heard several SETs on that speaker. 2A3s and 300bs. They didn't have enough power and SETs have problems making bass to begin with (a technical thing that any designer of output transformers for such amps knows all too well). 

There are class D amps now that would work well on this speaker. 

….most likely be the most heavenly for me?

this is a personal subjective question that only the OP can answer.  The 300b has a great warmth reputation, but 300b tubes can be pricey.  I’m using my 100db speakers to investigate tube midrange magic starting with SET amps 300b/45/2a3

+1 @atmasphere - some high sensitivity speakers require more current to drive/control the cone bass units. Seems a 301SET is lacking in power for the PAP.

@kennyc My experience mirrors your last comment. But that speaker's bass isn't difficult to manage. I've seen 2A3 amps play well on them but you couldn't play them very loud even in a small space. You simply need more power if you want things to be coherent. 

@whyrichard 

For me- no.  Even with their higher efficiency the PAPs sound more exciting with a more robust solid state amp.