I can't comment on reliability but length of warranty should count for something. Western Electric gives a 5 year warranty. As for sound, the $499/pair LinLai Western replicas sound extraordinary beautiful to my ears in my system. But they are not true replicas. They have over-hung filaments.
Here are some further thoughts:
https://www.stereophile.com/content/gramophone-dreams-48-venus-tube-western-electrics-300b
peace and strong emissions,
herb
Here are some further thoughts:
https://www.stereophile.com/content/gramophone-dreams-48-venus-tube-western-electrics-300b
peace and strong emissions,
herb