Thanks guys. I only have 20 hours on them and haven't done really any serious listening as the mids sounded a bit congested/closed in on first blush (and my dealer warned me about this). The bass is definitely as rated - and quite good. Efficiency appears to be 8-10dbs down from my Zus, so right on spec. The tweeter is sublimely extended with no fatigue.
The biggest thing I've noticed is how good off axis they are - I can hear so much more from the kitchen. Also, soundstage is further back than the forward Zus with more emanating from behind the speakers.
JD says 200 hours before they are pretty close to "there" - so I have quite a ways to go! I'll update this thread at the end of the week when I have 100 hours on them.