Paging @Paladin , who is one of the people buying up the world’s stockpile of NOS 6SN7s. Maybe he can give you some advice on what else to try, because I think he may have at least one of everything.
If you want to try a new production tube, @ValentineLuke liked the Sophia Blue, and he is one of the cools. I am definitely uncool, but I like the Treasure Globe. @pennstac is way cooler than me and he also liked the Treasure Globe.
And going back to vintage tubes, in this conversation, @stshields91 said he liked the Treasure Globe but thought the CBS-Hytron was even better.