Just my two cents. I've tried the Psvane black and grey bottle, and many new production 6sn7, as well as a crap load of NOS 6sn7.
I think the very best new production tube out there is the Psvane grey bottle 6sn7. I do think good NOS is better, but the prices can get insane.
As far as reliability, I've personally had worse luck with new production tubes than NOS. I've had a psvane kt88 and psvane 12au7 fail on me. I've also had a pair of sovtek 2a3 that went bad on me.
I've only had one NOS tube ever go bad on me, and that was more because I was running it past spec in a high powered amp.
obviously ymmv
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