anyone heard zu definition speakers?

I am sekeing to replace my current Quad 988's. My budget will go up to $15,000. I use Thor tube amplification 150 wattt monoblocks, Thor line stage aned phono stage, Thor Dac, with a Cary 306/200 which I use as a transport. My analog is a VPI Scoutmaster. In any case, My Quads don't have the dynamics and without the Audio Physics Sub there would be no bottom end at all. The room has been treated by Mike Kochman of Echo Busters and things have dramatically improved. But, the speaker. I've read that the ZU Definition was excellent. Have any fellow
music lovers heard the Zu Definition. All speaker suggestions would be welcome. My room is 20x 20 with 12 foot ceilings.