Best 6922 tubes for Conrad-Johnson CT6 preamp

First of all I would check out RAM Labs and see what 6922s and 6DJ8s they carries and then let Roger Modjeski select a matching pair with low noise or super low noise (proabably a combination) - I don't think there is anyone better in the business in slecting and matching accurately in all relevant parameters. If you want to go vinage NOS then I would contact Andy in Vitage Tubes Services who not only has a great selection, but he is a careful matcher. Brands are one thing, well selected and matched tubes is another and perhaps even more important.

I also ended up with the white label PQs and in my CAT amp sound like a very significant improvement over the Sovteks they replaced, but you must have reason to trust your sources as a noisy great tube brand is much worse than a good measuring and quiet Sovtek. If noise is your primary concern, I would proabably get a super low noise graded tube from RAM; NOS is becoming more of a crapshoot as supply dwindles - but if Andy says he has some that measure well, I think you can count on it.