A solid center channel is a must for home theatre in my experience. The Horizon with RAAL tweeter is also a large dynamic center. Glad that you're happy with your purchase!I just spent a few hours auditioning some movies with the new front stage.
I think the C426Be scared the hell out of Audyssey as it knocked down the center's trim to 5.5dB below the R and L speakers. I've never seen that kind of disparity before. I nudged it up and then played some busy scenes very loudly.
This is the cleanest center I've ever heard. Dialog is incredibly clear, dynamic, and detailed. It's also rock solid off-axis. There's virtually no discernable difference in clarity, response, or volume as I moved around to various seats. It's also incredible at moderate to lower volumes. This is where most centers tend to struggle. It retains high levels of intelligibility and dynamics even at a barley background noise volume level. The front three speakers create a massive and perfectly cohesive soundstage when called for just as easily as they do an intimate, confined space, and sometimes eerily so. It's been very difficult to peel myself off the couch. I never got the opportunity to listen to the Horizon center as it's been on back order. I'm sure I'd have been thrilled with it, but it's difficult to imagine a single speaker besting what I'm hearing out of the C426Be.