A friend owns the Zeus Ellipse DX45 speaker. It's a back loaded horn design, and the guys says it's one of the best he's ever owned. I have never heard it in person (he lives in another state), but something I might consider in the future.This is a Horning Hybrid speaker and agreed they're lovely. Will sound amazing on a SET and the Zeus or Aristotle would be a good match for your room size. Exceptional bass.
Industry disclosure: I'm a Horning Hybrid dealer.