Hello Scott,
   Thanks for letting me bring over the space heater and run up your electric bill.  As of this Sunday’s listening session, the amp officially has 7 hours on it.  It will continue to break in and improve, but the amp will really not get any warmer sounding.  As a transformer coupled push-pull design, I was looking for accuracy, detail and tight control of a speaker’s cone movement.  The amp was designed to drive electrostats or other load demanding big speakers.  
With your speakers and setup, I can understand the allure of single ended amps.  The amp I built a few years ago was a single ended 211 amp.  It sounded great.  I miss that amp.  It has more of the sonic qualities you seem to like.  
Given the option between the Sapphire and the Topaz amplifier, I would definitely go for the Topaz.  High voltage 211 tubes seen to have a magical quality to them.
I really enjoyed the listening session and even learned a thing or two (your listening setup caused me to partially rearrange my room – for the better).  I would love to do it again.
Lee