Linear Tube Audio

Btw I am very interested in the Ultralinear integrated.

Never heard either but just heard the Z10 at Cap Audiofest and it was fantastic powering Spatial Audio speakers. My first time hearing LTA and I was impressed.

Those are brand spanking new. My guess is they sound unbelievable much like all their other offerings...

Ive never heard a LTA product sound good, not sure why.

I heard LTA amplification driving the Spatial Audio's at Axpona and was super impressed with the sound of the system.  Mark Schneider, the CEO of LTA, graciously answered all my questions and explained the involvement of David Berning in the development of his line of amplification.  Virtually all the reviews of LTA gear are excellent.  The cost of the integrated amps on a per watt per channel basis is quite expensive, but clearly they use some amazing technology in their gear.