Absolare gear is top notch, gilded-tank-like solid, very responsive to tube rolling, and the personal service they provide (especially to facilitate experimentation) is second to none. They don’t get much forum time in North America, but they deserve more IMHO.
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?