Cornwall IV vs. Volti Rival, Razz; Razz v. 1, 2, 3 -- what changed?

Many good suggestions have been offered here.  I don’t think you will be disappointed with any of the Volti models, and if you can stretch to a Charney Audio Companion speaker that would be my choice.  The new Voxativ Ampeggio is another full range single driver backloaded horn system like the Charney speaker that is also very dynamic and good sounding.  I heard the PAP Trio 15s with the concentric midrange/tweeter option and I think it is one of the very best speaker I’ve heard at the $8,000 level.  I have heard the Quintet 15 with the horn driver option and it was good too.  
While not as vivid sounding as these horn and full-range driver suggestions, someone looking at high efficiency/easy to drive speakers should also hear Audio Note offerings.  They may look like ordinary box speakers, but they are among the most musically enjoyable speakers on the market.  On paper they are not extremely efficient, but I’ve heard them with SET and other lower-powered amps and they are easy to drive (Audio Note makes only low=powered amps).

Like someone said above.....

A little bit of mods on the CW4's really helps squeeze extra SQ out of those things.  

Damping the horn, tightening up the enclosure, and then a little work on the crossover does wonders.  It brings that speaker up another level.  

I had a pair of Chorus 2 for a minute. It was great speaker with the right kind of music but needed eq for sure! I’ve had CW4 for about 5 months, currently for sale. Not that I didn’t like them just found something that suited me better. The CW4s are waaaaaay better than the older Chorus 2. No contest. They do all the things that the more audiophile stuff does “almost” but are really dynamic and easy to listen to. They just sound right. 

Having owned nearly every model in the Klipsch Heritage lineup and today with a pair of LaScala and what has become known as “underground Jubilee” in house I find it hard to accept saying a speaker is horn loaded when the woofer remains a ported design. Include horn loading a 15 inch woofer and you’ve got an actual horn loaded speaker. Otherwise and is noted on the Volti site, the speaker is a hybrid. For true horn loaded speakers look to the Volti Vittora, Klipsch LaScala Jubilee and Klipschorn among numerous other true horn loaded designs.