Who makes the highest quality tube amps?


One scale of 1-10, 10 being best designed and constructed technically, personal sound preferences aside, who are the 8s, 9s, and 10s?

VAC, ARC, Atmasphere would seem like likely candidates I can think of. Are they ?

Where does Decware rank? Rogue? How about others?

SOme technical facts to help support any claims is appreciated please.

Durability and reliability matters to me here as much as anything. I would want my tube gear to continue to work as reliably as designed years down the road as well as up front.

THanks.

Thanks.
128x128mapman
Another tube amp feature that is of interest to me is tube biasing. I am interested in doing this as simply but effectively as possible. Maybe a meter is part of the solution. Which amps fit the ease of biasing requirement best?

Thanks.
Mapman, you just described my Emotive Audio Vita amps. Tiger maple bases and a retro-looking meter for adjusting each tube's bias. See the photo on my system page.
Aries Cerat is the new innovator in tube design with brand new technology introduced to tube amplification never been done before across the entire lineup

Impera II Preamp - Inverted Triode technology
Pondera Preamp - Negative Output Impedance Energey(Power) Supply (NOIES)
Diana Forte - Highest Powered Stereo SET amp in the world
Ianus - Brand new TriodeFET Hybrid design
Collatio - First True Class A SE OTL Amplifier
Etc

http://aries-cerat.eu/
 
Collatio - First True Class A SE OTL Amplifier
This is most certainly false. Single ended OTLs have been around for decades and by definition are class A.