Highest BUILD quality tube amps?

I've got numerous Icon Audio equipment and love each one. The build quality is second to none and the sound quality is excellent. I drive my vinyl set up with a pair of MB90MKII Mono Tube Power Amps. The mono's, preamp, and headphone amp are all wonderful. Whatever set up I have in the future I don't think I'd ever be without the Icon Audio PS3 MK II Super Double Cascode Pure Valve Phono Amplifier! 

+1 for Music Reference tube amps. Roger really knows what he's doing. The amps I have appear to be bullet-proof...

i haven't seen a mention of Cary.   Mine are going on 9 years old and not a single issue.  Had the pre=-amp modified to accomodate HT bypass and that was carried out flawlessly and supports attention was top notch.   My close friend has Cary also about the same age again no issues.   And of course there is the sweet Cary sound.

Really enjoy the sound and build quality of Linear Tube Audio (LTA) equipment built in Tacoma Park, MD. The equipment features David Berning's Zero hysteresis Output Transformer-Less patented technology (ZOTL). As well, it is always a pleasure to talk with, learn from and discuss high fidelity with owner Mark Schneider. In my over 50 years as an audiophile, LTA was the first tube equipment I ever bought. The LTA equipment is purely about music without thought of is it solid-state or tube.

Coincident Speaker Technology, my 300b Frankenstein mono's are PTP wired and have been trouble free for many years.