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

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+.

And - the greater your budget the more likely that you will benefit by attending an audio show such as AXPONA in Chicago to listen to various systems to see what you prefer.  Its at these shows that you will learn not only what sound you prefer, but also what electronics best mate with various speakers, because the mfrs always make sure they have the best system synergies to optimize the sound of their products.