Anyone listen to Zu Audio's Definition Mk3?

The Def5 is in the making right now =8^D

Hi Phil, I actually v. nearly got off this particular train when the balanced power/Black Hole combination sorted out the bass integration issues in my room with my Def2s, but I'm going to travel one last stop, and hope the view is picturesque enough for me to want to get off and retire.
On a serious note, the audiofool disease to continually upgrade is something I'm getting aware of with each major component substitution, and beyond a complete change in turntable I want to start concentrating on improving the system thru further mains/room acoustics solutions, rather than big ticket purchases.
I get the impression that on your upgrading to Def2s a few years ago you were immediately aware of limitations in the tweeter esp. and of bass integration, but still felt the overall package was worth the change, and with the Def4s ALL of these negatives have been addressed and they are as close to ideal as you could hope for at this level.
My wish is that I feel the same, and with mains/acoustics issues already significantly addressed will get that final sense of ease we're all looking for in musical reproduction.

I’m sure everybody on this thread has probably read my story about receiving a pair of Def 4’s, I‘d like to make a few comments about them. I don’t have the reviewing or the writing skills as everyone here and I think everything I’m experiencing has been stated. So here are a few general statements. From the first few minutes of listening it is very apparent that this is a totally different speaker than the MK3. From top to bottom everything is better and that’s not putting the 3’s down, I enjoyed my brief time with them.
Where I experienced some shrillness from the tweeter on certain cuts is now gone. The bass is much tighter and powerful and the overall sound really fills the room (22’x18’) Off axis listening is great. Cd’s that I haven’t played in years are now sounding pretty darn good. I’m using the Melody I2a3 and I’m sure the other amps and associated gear talked about here would take things to another level but I feel the 2a3 does them justice at least to the point that I’m really enjoying the music and not stressing about upgrading something and that’s really what its all about.
If anyone is contemplating upgrading from the 2’s or lower and can afford it, you won’t be disappointed. By the way I got the honey walnut finish.
Irwin

If anybody gets a chance to hear the new First Watt SIT amps with their mk.4's, please let us know how it sounds?

where can I hear these in Ontario, Canada?