The OP asked: "What does Wynton Marsalis listen to?".
For speakers the answer is Tetra.
Full disclosure, for years I was the only ATC dealer in California.
Now, retired, I consult in marketing for Tetra Speakers ( dot com).
It is quite true that many top artists, major studios and the world's greatest concert halls use ATC powered speakers. Artists mentioned and many more.
In studios and concert halls, accurate presentation of the sound recorded and amplified is vital. +1 "extremely dynamic, supremely accurate".
However, even though many artists want to experience music in their homes as they have in the studio, that sound is not necessarily what is desired in the home.
+1 "professional studio monitors and that ilk have a different set of design parameters entirely. Near field and hear all the details."
I first became aware of Tetra speakers when I fortunately got a pair of their mid line 506 speakers. I heard from those speakers what I have never heard from ATC or any speaker in 50 years: shockingly realistic music. And when I got a pair of Tetra's entry level speakers, the 120Us, they sounded as real as the 506s just on a smaller scale.
And when I went to their website I saw the rave comments of many of the world's greatest artists. They all are dedicated and proud Tetra owners. From Herbie Hancock to Ron Carter to Dave Holland to Keith Richards, etc., etc.. Herbie has 6 pair and Keith takes a pair on tour.
Some may say, what do artists know of what is possible in High End Audio?
Tetra artists say that their Tetras sound like the hear themselves on stage.
I say, who would know better?