Horns with good timbre and tonality?

I did not hear Blumenhofer but I heard about them. I think, you are headed in a right direction. Don’t buy anything until you have auditioned them. If you cannot..well..

What about Blumenhofer? Anyone hear them? 
 

Klipsch jubilee had terrible timbre and tone. 
 

I can’t audition avantgarde.  

Charney Audio and Volti are two to check out.

Goto. 

I have been beyond impressed with my JBL 4367 since purchase. They were great right out of the box and only improved with setup over time. I do highpass them to subs but I do that will all speakers. I struggle to think of a better speaker I have heard. Some different but not really better.

the tweeter is adjustable a bit too so between the adjustable tweeter and toe in you should be able to get the highs right where you want them. Mine are a touch rolled off but you could make them sound flat too or a touch bright even. Nice to have flexibility.

I was an electrostatic owner for decades, made the switch to horns (Avantgarde Duo) for my main system in 2006. What upped the game in terms of timbre/tonality was the upstream components (Lamm ML2- such a good sounding amp), different phono stage (from Steelhead to Allnic H-3000), tube rolling the Allnic rectifier (my fav is a GEC u52), the addition of 15" subs and a switch to Koetsu stone bodied cartridges. This particular system sounds the best it has since I started to assemble it. 

Avantgarde are arguably some of the best horns going.

ATC is hard to drive with low powered tubes. I’m thinking about trying horns. 

I’m not familiar with horns, but my experience with ATC speakers is that they very much reproduce a “live” sound.

Do you think they can reproduce dynamics ?

If you are looking for realistic piano, cello and symphony, have a listen to Martin Logan Renaissance ESL 15A.

These puppies have everything you are looking for: speed, dynamics, timbre and tonality.

As a musician, I find that these faithfully reproduce that "musicians in the room with you" sound. However, they do require a lot of space around them.