Treated paper drivers when done correctly can sound very natural and dynamic. I don`t own Zu speakers but one hugh advantage they have is high sensitivity and benign load characteristics. You are`nt forced to settle only for high power amps, but have the option to use high quality but low power amplifiers (SET,OTL,First Watt etc.) which can often sound better.
Zu Omens Vs Dali Vs Vandersteen Vs Sonus Faber
This post is FYI for those wondering about the quality of the Zu Omens (Don't worry, Be Happy and get them!):
At my personal recommendation, two friends here in Tucson bought Zu Omens, and one replaced her floor standing Dalis with the Omens and another replaced his Vandersteens with the Omens. He recommended them to two other friends here in Tucson who replaced their speakers with the Zu Omens. Once of the pairs replaced were Sonus Fabers.
I imagine that the Soul Superfly's are better of course.
BTW, I have Zu Druids. I am hesitant to replace them because I like them so much that I have painted them piano black and put granite bases on them. They bested (for my preferences of course for immediate rich sound) some Dynaudio, Dali, and Spendor floorstanders. However, I have not heard the Zu Omens and Druids in the same room. However, at another person's home the Omens sounded wonderful. Similar magical sound as the Druids with perhaps a little more bass and they are certainly less imposing in size (but not in quality) in the listening space. Hmmm, maybe I can get a pair of Omens and paint them piano black...