Integrated Tube Amp Demo

While I certainly understand wanting to go with a tube integrated, not sure that’s the way I’d go with your speakers.  At 88dB dipping down near 4 Ohms with extreme phase angles, the 805s don’t scream tubes to me.  And at the very least you’ll probably be pushing most tube amps pretty hard, which is less than optimal. 

I’d be more inclined to try a hybrid integrated like a Unison Research Unico Due, which has a tubed input stage but SS amp biased toward Class A.  This design puts out plenty of power and is stable down to 2 Ohms so will have no trouble driving your speakers yet still have a good bit of that tube magic.  And, importantly, Fidelis (distributor) offers in-home trials so you can try in your own system.  Anyway, that’s my take, and best of luck in your search. 

You have some solid names. I think the Line Magnetic line has dealers
who would agree to a trial of some sort. I tend to agree with soix re your tube choice unless new speakers are in the future. Maybe a hybrid ?

Luxman LX-380 would a solid candidate for this list as well.

I know there are luxman dealers willing to ship amps for a home demo.

rogue audio cronus magnum iii.  
refinement, transparency, sound stage and 100wpc driving energy and dynamics and ability to drive speakers that drop to 4ohms.  
yours will need this capability for full potential sound.  

Thank you all for the helpful and thoughtful posts. I plan to post the results of my listening experiment in the future, which will likely take a few months.

 -G