Casouza, thanks so much for this informative post. I could care less about measurments, only the sound.
Jack,
Exceptional speakers do not need to be reasonably flat with wide dispersion to sound good. You are right to care only about the sound. Let us know how the Zu's sound if you get to audition them. I enjoyed your review of Energy Veritas a while ago. Good luck and enjoy your vacation! (BTW: Las Vegas Pro Audio is on your route - might be worth your time as the live, dynamic or impulse response that Casouza describes as a feature of the Zu's is also a trait you can often find in pro audio gear)