Highest BUILD quality tube amps?


Not so much with sound...lots of ways to fine tune thru tube rolling, etc. I'm just curious which tube amps are built to last for many years with the least amount of repairs. I know Mcintosh comes to mind for longevity. I was snooping around on the web and Air Tight seems to be built like a tank and I've never read any poor repair histories. Luxman same thing. Any others come to mind?
aberyclark
I own both a Cary SLI-80 and an Ayon Audio Spirit III.
IMHO, Ayon is far far superior in build quality (for twice the price at new retail, so you’d expect that).
The Cary’s volume pot has become loose over time, and so has the power switch, and the original remote is starting to fail.
The Ayon has the additional benefit of tube auto-biasing and comprehensive startup/shutdown sequences that extend tube life. And it is a far more controlled and prcise sound than the Cary (which is still very pleasant when not making direct side by side comparison)
That said, the Ayon remote is a super solid shell of heavy aluminum, but the soldering of the board to the battery holder is weak and almost impossible to repair (I tried, failed and had to order a new remote).

Tube Research Labs  ( TRL )
... God Bless Paul Weitzel ... 
Completely in their own exalted league.
QuickSliver Audio, Have Mike Sanders 60 watts mono' amps  very musical amazing Value.  Very quite ! just love those amps , about a year old no problems  I am also testing his latest QuickSilver Headphone amp. WOW is the word it is built like a tank very musical and is probably one of the best tube headphone amps I have heard !