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 had very good long term service from my Quicksilvers, but I'll give Manley another recommendation.. I've had my Manley SET 300B's for about 5 years now  A light bulb went out once.  An added benefit: the sound is glorious.
My Audio Mirror 45 Watt SETs have been working flawlessly for years. And with auto-bias, the power tubes last a very long time. Glorious sound to boot.
I will add a vote for PrimaLuna ProLogue 6 amps, which I have owned for a number of years, changing the tubes once. They were used when I bought them and have been great. They were a recommendation from Kevin at Upscale Audio. I have never had the urge to change.
Lots of good suggestions.  I may have missed recommendations for Decware, VTL and I agree with the recommendation of Manley.  I’ve owned 4 pieces of Manley and never a problem.

Quicksilver Audio, Audio Connection
for over 29 years have installed them successfully with
Vandersteen, Proacs, Klipsch, B&W, Magnepan etc
Point to point wiring.
Easy Bias
Great Transformers
Slow turn on 
Issue free operation
unrivaled support
sound extraordinarily engaging.
Made in the USA
Pride in ownership.
can sleep well at night.....

 Best,
 JohnnyR