Hi, Eric. All of Herbie's Vacuum Tube Damping Instruments work very well with 6922-type tubes. Although differences between them are subtle, descriptions on our website are straightforward, to help differentiate.
To bring out the best potential of your gear, I recommend Preamp UltraSonic or UltraSonic Rx. Preamp UltraSonic will unmask lots of intricate detail, while Rx adds a highly resolving yet slightly more "organic" result. You wouldn't go wrong with either.
A combination might yield ideal results for you: UltraSonics in the preamp, Rx at the monos (or PEEK at the monos if you'd like to bring out a little more "heft" in the mids/lower-mids.)
Steve HerbelinHerbie's Audio Lab