I don't have a Pathos but as a general suggestion - for new production tubes try the JJ's, they certainly have some warmth not easily found in new production tubes, but they aren't quite as quiet as Sovteks & 6h23's. I use them in one of my amps and am quite fond of them - they were a bit noisy for my pre amp where, as a pratical matter I have settled on NOS 6h23's.
