Soundstage and explosive dynamics?

I’ve never once heard a pair of horns I liked. That was the worst part of the last show I saw. The house had great big honky JBL horns that even sounded distorted to the audio rube I was with. I’ll keep listening, but those of you who insist horns are the ONLY option for dynamic sound are just dead wrong.

I'm not saying only....
you could also go with efficient speakers with large woofers.
those 2 options are your only route to take for the ultimate in dynamics. 
 And again I'm not sure about the Jbl horns that you heard but normally horns actually produce far less distortion than other speakers. 

I can sympathize with Kosst over his skepticism about horns.  For many years I felt exactly the same way---all horns I had heard had an annoying "shouting" coloration that I just couldn't get past.  And I still feel that way about many horns including for example any speaker with an Altec 511 or 811 horn.  But there are horns and drivers that don't suffer from these colorations.  The breakthrough for me was hearing a Western Electric 32A horn and then later living with the Altec 32A and 32B horns which are close cousins to the WE.  With proper compression driver and crossover design, speakers with these horns do not have any of the horn colorations that bothered me so much in the past.  I have also heard other horns that don't suffer from traditional horn colorations (such as Emilar EH-500 and YL Acoustic horns) and I am sure there are some commercial horn speakers that are fine too but my experience with commercial speakers is too limited to make specific recommendations.

Even the 511 can sound good if it's properly damped. 

Have not tried the 811