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

@shadorne the difference between a saxophone and a lawnmower? 
Vibrato. 

There is hi-fi and there is my-fi. I tend to believe that people want a system that sounds good to them.
I've been lucky enough to be in the studio with some great musicians and witnessed recordings first hand.
Unless we are in the studio how do we know what is accurate?
And if the system is truly accurate wouldn't some of these recordings sound like they were playing through Yamaha NS10s?
Everything in the studio gets processed. Snare drums have noise gates to prevent bleed over or the snares buzzing.
I can usually tell if the drummer is using a brass or wood snare or of he is using Paiste or Zildjian cymbals.
The guitarist is another problem, he is running through a pedal board, so how does one know if what we are hearing is accurate?
Usually the musicians don't even know what is accurate they just know if the performance sound right and too many takes kills the vibe.
For me,if I can hear those differences then all is good.

I recently picked up a pair of humble Vandersteen 1ci and they're far more musical than any Harbeth I've heard.

many choices for the above budget. Several great ones already mentioned. Depending on the gear, room etc one can end up with diffrent set-up, inclduing solid state vs. tubes etc and thenmatching speakers will be diffrent. 
Vinatge Altec speakers like the 19, 604 based or Flamenco/Valencia can be great (the latter with legend, Shindo, Air Tight, Trafomatic, Almarro, etc etc gear) or Devore O/93 or O/96 can work really nicely. 
KEF 107 or ADS 1590, Merlin (now out of business), ProAc, Audio Physic Virgo could be awesome for practically nothing with modern or vintage solid state...and then many modern speakers some folks already mentioned. The Vandy Quattro and Treo (perhaps with Vandy subs) is a great choice to my eras for much less than the above budget. Pretty good customer service too. No affiliation with any of these speakers just some experience with 55 or so pairs and many audio friends with diffrent gear and room.

FWIW, my taste runs to the "musical" side of things. My next speakers will be the Devore Gibbon X, which goes for just over $15k. The new Super 9 is less expensive and still great. The Devore room with the new 9 was my favorite room at RMAF 2017 and I hit almost every room (geeked out for 2 days).

As others have mentioned, Harbeth and the Vandy Quatros are also great. Daedalus' new Apollo is also worth a listen for a very musical speaker.

While not generally placed in the "musical" camp, I have owned Aerial Model 9s for over ten years and really love them. Every time I consider new speakers, I can't pull the trigger. What I love about them is that all styles of music sound great and every upgrade in electronics or cabling or power filtering can be clearly heard. For your purposes, you may want to consider the newish 7t which is an upgrade from the 9.

At your price point, I doubt you can go wrong. Have fun.