Quad Listener Contemplating Horns

I have reemerged into this mad pursuit after a nine year hiatus, and just got my existing system back up and running (Crosby Quads, ARC SP-10, Classic 60, semi-tweaked Well-Tempered TT, Lyra Parnassus) after that many years (freshly gone over, retubed, TT readjusted, etc.)
The thing makes music, no doubt, but I'm still left with the complaint that I always had about this system, and earlier variants- the whole illusion seems to collapse on large scale pieces- not talking about volume here, but a combination of other things going on, including distortions that have to do with the overall spacing of the instruments- it is like the image is constricted even if the program content is not. (OK, enough of my psycho-babble).
Here's the question- I know that there is a long established school for horns, very low wattage tube amps. Need to know how liveable these systems are- not as a substitute, but in addition to, the more 'conventional' electrostatic system I'm running. I know I have some auditioning to do- I want to hear the Avantgarde speakers with the Lamms or Audio Notes, perhaps a Carey amp. I'll probably use the same front end, and at least for now, the SP-10 (which, by anybody's standards, may just be too noisy to tolerate over a system with a very low noise floor). I'm particularly interested in the insights from folks who use these types of systems as one among several-