Which Zu for you

Leotis, the twin driver models are 8 ohm.  Omen I believe is 12 ohm.

>Whoopycat does the defhead also give the emotional connection that the single driver provides?<

Yes and no... IMO the Defhead does dynamic peaks better and really puts you inside the music, whereas the Superfly has more of the "you are there, front row" intimacy.  As cobra213 has put in more eloquent terms in other threads, it depends on what you value more.  That said, I'm making the differences sound bigger than they are. 

BTW, my tube amp for the Defheads is similar to the Miniwatt that Robert used with his Supremes. 

Yes, go with a model that has the amazing Radian tweeter.

Zu speakers vary in impedance. Def 4s are nominally 8 ohms, Druid Vs are 16 ohms, Def 4s can be custom wired 32 ohms, etc. Check-out ZuAudio.com. Tube amplifiers prefer high impedance - in some cases (ie., OTL) the higher the better (ie., 32 ohms).

I recently acquired Zu Audio Druid with IBIS cables and use them in a 23x26x9 room. Captivating sound. Retired, I literally have music going 18 hours a day. Do yourself a huge service and talk to the folk at Zu. Their counsel is invaluable to you selecting the correct speaker based on room size and make up, listening preferences and associated equipment. All Zu are efficient leaving matching a room paramount. Never mind WAF. Room correction even artistic diffusion isn't cheap and takes over where ugly left off. Spending time in an schizo looking half home and half padded cell is not my idea of an inviting space. LOL.  Enjoy !!! 

Definitely no room treatments in my set up. The speakers are in the living room just flanking the TV on the wall. I know it's not ideal but it's the only option.

Robert, If you don't mind telling me what type of music do you listen to and do you ever feel that the almarro runs out of steam?

My thinking is moving more toward either omen def mk ii so that i can get the radian tweeter later or waiting to find a really good deal on some druid v. unfortunately, neither option pops up that often. like whoopycat said I just need to figure out which presentation i like better - which is a bit hard without hearing first hand. perhaps next year zu will bring a def to the newport show, although i would hate to be out of a system for another year.