What do you consider the most musical speakers—$15000 & under

@zq1 I encourage you to listen to Joseph Audio Perspective speakers. Retail price is $13K. I own them. Great sound, great looks, nice size and I think they are a high value proposition. They match the definition of what you are seeking. But make sure you actually hear them: your ears are the ones that have to live with your purchasing decision.
Regards
Al

Hard core hobbyists know that the term "musical" is code for mushy, indistinct and bloated. The term "accurate" is code for brittle, dry and clinical. 

What you really want is a speaker that is neither musical, nor accurate. ;) 

Sound with no adjective to describe it!  Metaphysics.

To answer the OP Charney Audio does a great job with his tractrix designed rear loaded horns. They are both accurate and musical with very low distortion and wide range.  Don't take my word for it listen to them at The Capital Audiofest  next weekend.
http://charneyaudio.com/speakers.html
 

harbeth 7es3 very musical and still accurate imo!