Anyone listen to Zu Audio's Definition Mk3?

Ghostinthemachine, I'm based in the UK, so my advice is to email Sean Casey at Zu direct. He is a stand up guy, always prompt and super enthusiastic with replies to enquiries.
For my part I have run Def2s since 2008, and have just paid deposit to get Def4s construction up and running.
I would urge you to find a way to audition the Def4s, the Zu sound is just such an involving way to enjoy your music.

Ghostinthemachine - please contact [email protected] with regard to auditioning Zu.

KeithR, have you experimented with 6SN7's in the Sophia's to eliminate the slight midrange glare? How are they sounding with the Def's?

Thanks