Floorstanding speaker experiences/recommendations in the $12-25k range

The Quad Electrostatics for 15k are the most transparent windows into the music hands down in that price point 

 Lots of incite and great response.  I own the QLN P5's that you mentioned with the Devores.  Devores were one of the speakers I really wanted to hear but didn't. My Final 2 choices were the P5's and the Joseph Perspectives. The P5's are everything you'll read about them, really good. Soix had mention of your amp and I think it would be ok but suggest you call James at Choice Audio in Mpls and get his opinion , he knows the Qln like the roof of his mouth.

I didn’t read all the posts. I also have Dynaudio HS on the stand 20. My suggestion is a pair of REL subs. They will do much more than just add the bottom end. A pair of S/510 or S/812 would do it all. I have a single S/510 but my space is much smaller than yours. Oh and I think the the Octave Research might not have enough grunt for the HS. I use an Aestheix Mimas on mine it’s about double the amount of power the Octave has. Dynaudio’s really love power!

I’ll second Vuch. I have the Magico A3 and love them, and they have ample bass for me w/o sub(s). Not sure how they sound with low power. I’m pushing with 300 w Hegel 590.

I don’t normally agree with ANY dealers but audiotroy gives good advice here and so does soix . I have heard Legacy and Devore speakers and they are tremendous. For vocals and jazz, the Devore speaker is a beautiful speaker.