Hi Stickman, I'm familiar with Klipsch but not much so with Klipschorns. I have LaScala Trio up front and have them paired with (3) Klipsch RSW-15's and it sounds great. You are likely to get more help in the Klipsch forum https://community.klipsch.com/index.php?/forum/30-home-theater/. Looks like you joined back in 2009.
Horn Speakers and Sub Woofers
How difficult is it to mate conventional subwoofers with horn speakers, in particular Klipschorns. I'm moving my 1987 Khorns to the large living room for a 'home theater' setup. (I have two good corners for the Khorns). I am thinking of adding one or two medium sized Rel subs to the setup to use for movies. Have you tried subs with Horns or corner horns?