I have the regular Zu Omen Defs and there's another member that has a pair but I can't for the life of me remember his name right now :-( I'm no reviewer but I can tell you a little bit about them. They are very clean and clear sounding.Very detailed and can play very loudly without strain.Live recordings are thrilling,it's almost like being there IMHO.The caveat is poor recordings have nowhere to hide,if that kind of thing bothers you.An example is recordings that were meant for radio play having one instrument or vocal overwhelming and out of balance.To me it's like being in a club and one of the mics or amps is turned up a leeetle too loud,but still really enjoyable.
I power them by ss (summer) tubes (winter) and listen to mostly blues and rock,both acoustic and electric. The nuances I can hear are why I really like them - breaths,fingers moving on the strings or clacking valves,feet tapping, the ambient sounds in the room, all of the layers.Dimensionality and realism is what I'm attempting to convey (poorly). I have a medium sized room so the soundstage is not deep but it is wall to wall.I hope this helps you out a little bit.