BAT makes a fine phono stage. I think you'd want to stay with the vkP5 or vkP10 models without the super paks if you want to tube roll. Also, they only have balanced outputs.
Aesthetix uses them for output drivers, 1 in each channel. I don't remember how much the Rhea responded to changes in the 6922/6dj8 tube.
Manley Steel head uses a few 6922's. You'd have to check with them to see if the 6dj8 is a direct replacement in their circuit. Most times it is, but it's always better to ask.
