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

Check out spatial audio labs  open baffle speakers with Beyma AMT tweeters,midrange  and powered sub the x3,X5 under $10 k and the x3  beats many speakers 2x this ,
also the latest Wilson Audio speakers just under $20 k 
have tons of $$ trickle down technologies very detailed and musical , both brands different but excellent .

In today’s market there are many, many wonderful speaker systems in your stated price range. I know you are looking for suggestions but it just does not work that way. What sounds good to me may not sound good to you and what works in my room may not work in your’s. You simply must do some work here. Get out and listen to as many speakers and audio systems as you can. This is important because you have to learn HOW to listen. Find a good reputable dealer who’s opinions you can trust. When you are ready to purchase (either new or used) remember to match your speakers to your room and equipment. Good luck!

Magico, Vandersteen, Legacy, JBL.

Martin-Logan electrostatic speakers, Ohm Walsh, biggest set of Magnepans you can find.  

You may want to provide more specific requirements.  Such as the rest of the system you intend to drive the speakers with - solid state, tube, SET, low power, high power, etc.  What type of room and furnishings you will be using.  What sound qualities are most important - detail resolution, clarity, soundstage, imaging, etc.  

If you prefer the sound of tubes, or even a SET amp, you will require more efficient speakers than if you prefer solid state amps with lots of power.  If you like the sound of Harbeth speakers, you will require a powerful solid state amp to achieve their best sound (as Harbeth demos their speakers with and suggests).  Etc, etc, etc.

You should also identify your budget for your system and the speakers.  It doesnt help you if you have a limited budget and you receive suggestions for speakers that cost $20,000 to $50,000+.