Anyone heard new Zu Union 6?

I listen to a variety of music but most often listen to indie rock and pop with a good deal of classical music mixed in. Particularly, violin. Some straight ahead rock and roll and the tinge of classic rock like Pink Floyd and the Eagles. Some electronic. I listen most often from mid 60 DB's to 70s with 80ish DB peaks. 

I am right now in a free trial of the dirty weekend 6s. I have mixed feelings. Nice deep bass response. I like the mid-range performance considering it somewhat lush. But the treble clarity and presence is not quite there for me. Resolution, too. I am considering an exchange for the union 6s. For example, I am missing the sense of spaciousness listening to wish you were here on vinyl that I got with my old ADS 1230s.  The higher notes seem suppressed in the mix. I can see the most people here with experience with the dirty weekends have had the older models but any thoughts would be appreciated.

So would you say that the Unions lean bright or do they have a balanced sound--if the rest of the system allows it?  I am thinking to add a class D amp to the DWs to boost the treble and clarity or go with the Unions.  I can buy a pair of Unions to test alongside the DWs while extending my DW trial period then return one or the other--according to Zu.  This seems to be a pretty exorbitant step to take.  Right now, I am leaning to getting a Peachtree Nova 150 for $999 with a 30 day trial period. Test out my class D theory.  Zu suggests tubes but that would seem to compound the DW's warmth.