I am in the same boat as you. I tried the "new" Sovtek 6922's and they sound terrible to my ears. I have also tried the EH 6922 tubes and for now have settled on the JJ 6922 tubes. I am tempted to try the 6h23eb tubes but I have heard they can be bright.
You might want to call Art Ferris at AI, he sells replacement tubes for the 3A and he told me that he rejects more than half the tubes he tests. His prices are a bit higher than the norm, but you will get perfectly matched tubes.
Let us know how you made out.
You might want to call Art Ferris at AI, he sells replacement tubes for the 3A and he told me that he rejects more than half the tubes he tests. His prices are a bit higher than the norm, but you will get perfectly matched tubes.
Let us know how you made out.