Anyone listen to Zu Audio's Definition Mk3?

Agear- I'm pretty much settled on tube right now. I've had Mcintosh and FirstWatt, so well aware of the best of SS type designs w/ Zu, which I'm sure ASR is in the same league as.

My room is a bit of a bear and eats bass, so that has led me to P/P amps in general--SET hasn't worked out in my room.

Keith, that makes sense. I think the secret sauce with ASR involves the battery powered input stage. Glory and others can chime in on how it sounds with the Zus....

I can pretty much understand where the pro and not so pro ASR comments are coming from. It's the age old debate as to whether cool detailed neutrality is preferable to a maybe more colourful but equally vibrant sound.
My Def 4s are due to be ready in July, and having taken on a highly neutral and transparent tt/arm (see my thread on the analog forum 'Trans Fi Audio Salvation direct rim drive turntable') I'm on the hunt for a neutral cartridge.
The market for an upgraded amp is an interesting one, currently I run Hovland HP200 tube pre/Radia ss pow, which has served me well with the Def 2s. I have identified three ways to go if Def 4s indicate need for improvement, all for about the same price as the Def 4s. These are: the ASR Emitter 2, Dave Berning Z-OTL pre/pow, and the Audion pre or Silvercore TVC pre/Audion Silver Dream pow. My only issue with the ASR as a complement to the Def 4s is that the amps are overpowerful at 250w/ch feeding 101+dB efficient speakers, which by design only need the first 15-30W on tap. Doesn't this leave a possible power/impedance mismatch between the ASR and the Def 4s, showing neither to their best advantage?

Actually I meant the Audion Black Shadow pow as one of the alternatives to my Hovland Radia, and alongside the ASR as final upgrade choice to feed the Def 4s

Spiritofmusic,
Will it be possible for you to actually compare these amplifiers in your system? I`d think the Audion and ASR are different enough that you`ll definitely go in one direction or the other.