Horn speakers , high efficiency but not “shouty”


I am interested in a high efficiency horn with SET AMPS, in a 12 ft by 18 ft room. 9 ft ceiling .
I have narrowed my choices down to Charney audio Excalibur http://charneyaudio.com/the-companion-excalibur.html
and rethm maarga v2
https://www.google.com/amp/s/audiobacon.net/2019/04/18/rethm-maarga-v2-loudspeakers-listening-sessio...
would appreciate input from any one who has heard the above speakers or someone who has a similar system . 
listening choices are vocal music , no classical music.
Very rarely might want my system to play loud party music .(extremely rare ) does not have to play it like solid state system. Thanks in advance 


newtoncr
Post removed 
@roxy54 

Duevel are omnis that use a horn conus for 360 degree sound dispersion. As such they are a hybrid. they at 94db efficiency also approach horn-like efficiency and have an easy load for SETs
antigrunge2,
I owned Duevels for a short time, and I have never heard them described as horn. The drivers are not horn loaded. The pointed cone above the driver is only a means of dispersing its output. That's not a horn.  
If you check Duevel‘s own description of the Sirius on their website, you will see them decribe them as omni-horn speakers: the conus has amplification and dispersion effects, hence the horn designation. If you chose to rule them out as such, so be it.

I deem them relevant for this discussion for their horn like driving characteristics and they sure as hell don‘t ‘shout’
The horning hybrid Aristotle seems to be an interesting option after talking to Colin in Nashville.
The dx-65 driver vs the pm-65 driver how much is the sound quality difference. I see a horning Aristotle in Audiogon with the dx-65 driver for a great price. Thank you