6922 tube selection

I agree with Marco1 regarding the Siemens made/Telefunken branded 7DJ8/PCC88 at Upscale. Admittedly more expensive than what you're looking at but when I used them in my Premier 16LS2 and Premier 140 they were about as good as you could get without spending way more money and even then, not sure if the uber expensive varieties were really worth it in comparison.

Are you saying that tubes purchased from Vintage Tube Services (Andy), Brent Jessee, or Kevin Deal (Upscale) that are listed as NOS are used? The first two may carry tubes that have been used but will always say so and will tell you whether they test as new or not.

Of the two choices you list, I preferred the New Sensor "Genalex" Gold Lion. But that is just my taste given a forced choice between the two. My experience has been the NOS last a helluva lot longer than current production and that's based on both small signal and output tubes. There are some times when you get what you pay for. Just my 2¢ naturally.