Charles1dad,
Wow, you certainly have heard a lot of the gear I wish I could audition. Also, we pretty much agree on the sound of a lot of brands of gear. I too have heard the Viva and Trenner and Friedl combinations and they sound very good.
My own personal focus is on low-powered tube gear that is pretty much only suitable for speakers with efficiencies close to 100 db/w. At the Washington DC CapitalAudiofest, I heard a single channel (mono display) amp built by Aldo D'Urso (the builder of my amp and preamp) that utilizes the 217 output tube. This is one of the best amps I've ever heard. I don't know how it compares to the another amazing amp I heard, the Western Electric 59B (meshplate 252 tube), but, it was MUCH cheaper in price.
Any chance that you have heard David Berning's 211/845 ZOTL flagship amp? His other ZOTL amps are a bit lean sounding for my taste, but, they are still certainly contenders where a little bit more power is needed than the stuff I play with.
I know we are listing crazy expensive stuff here, but, there should be a place to mention more down to earth gear that sounds great, like Wyetech (tube) and First Watt (solid state) gear.