Opinions wanted: 10-30K Speakers for Jazz/Folk

I have $30K speakers I love a lot. But I will always miss my Quad 57s. Especially if you listen to folk and jazz, the Electrostatic Solutions Quads are $6500 and will thrill you for years or for ever.
They draw one into the music unlike any.

There are two speaker systems I'd recommend in your price range.  Buy either of these and you are DONE.

The first is the Dutch & Dutch 8c.   It is a total audio system, not just a good loudspeaker.  I have never seen a loudspeaker system so fully engineered.  Just add a laptop PC or streamer and you're done.  Comes with built-in, tri-amplified electronics, DSP EQ and DAC.   You don't even need speaker cables.  Just put it on your network and connect.   There is some critical setup to do during installation, but when you're done, you'll have sound as good as anything, at any price.  The imaging is the very best I've ever heard.  No shortage of dynamics, low end or mid-range clarity and detail.  Beyond stunning.

$12,000 new, retail.  There's a pair used on Audiogon for $9750.

The other loudspeaker system is the Linkwitz LX521.   Again, this is a fully tri-amplified and powered system.  Pre-built with electronics is somewhere around $15,000.   You can buy it as a kit and build it yourself, with a total project cost probably around $5000 - $6000.   Up to you.

@mglik is right. I have used both Quad 57’s and the latest versions. The latest gives you an extra octave top and bottom, but there’s not all that much music there. The 57’s are just as satisfying as the latest versions.

The second best room I’ve ever heard used three pairs of 57’s, stacked. The best is my current room with 4 modern Quad ESL’s.

Rockport Atria II's.  

At the high end of your range, but I think they do really well for what you're after.  I find them to be exceptionally accurate, but without venturing into sounding clinical - more "musical" (admittedly a hard to define term).  Voices come through with warmth, without sounding colored (Joni Mitchell's "Blue" sounds amazing, and IMO it's a hard recording to reproduce well).  Jazz records have a very nice spaciousness and sound stage, with live recordings sounding like they are really live, more than just a live recording ("Ahmad Jamal's Alhambra" is a great example).
https://rockporttechnologies.com/atria-ii/

I have mine paired with a Nagra Classic INT integrated amp.  Extremely happy with the combination. 

ProAc K3 or K6 signatures, they don’t need a ton of power but they will reward good power.