I spent the last 3 hours deciding which tubes I wanted to buy for my new Mjolnir 2. Unless the stock tubes change dramatically Id say solid state is the way to go stock. Anywho, I decided on a few budget options that are made new (Genalex gold lions, and JJ gold pins), and one NOS I found. The NOS Amperex tubes seem to get good ratings and I was trying to find a PW D getter for reasonable money when I found these from woo audio
https://wooaudio.com/tubes/amperex-6922-pair
Not many details other than "NOS (new old stock), Holland made. Ultra low noise and low microphonic, deep, clean bass, an excellent extension on tremble, full body mid range." The price seem right, so I ordered them. Tube prices have gotten absurd. Hopefully the factories that are still making tubes step their game up so there is no need to search endlessly for something made 1/2 a century ago!