Most musical stand mount loudspeakers

Spendor sp100r2 with the right stand was an unbelievable listening experience.
I have not found more other stand-mount loudspeakers that sound that good in terms of timbre and resolution.
The listening was made with several amps (solid-state and tubes).

Back in the days of yore my friend Les claimed that his Symdex Sigma's were the best speakers ever! They were designed by Kevin Voeks.- who went on to do design work for other companies. Les previously had DQ10's. I didn't believe his claim - I preferred Rogers LS3/5A's! Today the Sigma's are forgotten, while the small BBC monitors are still in production and have a cult-following!

And don't neglect the much lauded Reference 3A de Capo

The Kaiser Chiara is the best sounding stand-mount I have ever heard.  Brilliant speaker with a gorgeous, musical sound and delivers a brilliant soundstage.  Eye-popping $22K price point but they deliver amazing sound.   

Horribly biased here since I make them but I would nominate my Verdant Nightshade 1s.  I spent years trying to find a stand-mount that I really loved that worked in my space and was on budget (under $10K).  I ended ups starting my own company to get it.  The Nightshade is a touch warm but supremely musical with a huge soundstage and great imaging.  I produce a higher end speaker that is more analytical and detailed but IMO, less musical.  Different strokes.... 

I would also nominate Raidho's series of stand-mounts.  In the right space (they won't work in every room), Raidho's deliver an immersive and addictive soundstage that is really special.  I owned the X-1s for a stretch.  

I listen to Classical, Jazz, Classic Rock, 80's broadly, Synth Pop, and Heavy Metal.  

I have Joseph Audio Pulsars and I love them.  I've paired them with REL T7i subs and they sound wonderful.  Tonally beautiful. Huge and precise soundstage.  Quite dynamic for their size.

I listen to a lot of Jazz, acoustic singer songwriter and rock.  But I like a wide variety of music and, short of really large scale orchestras and pipe organ, I don't find much they can't handle.

I have found them to be very accurate.  They don't make everything sound the same.  Great recordings sound great.  Good recordings sound good.  Bad recordings sound like what they are.