Aesthetix Atlas tube rolling

Anyone replace stock 6N7S tubes in the Atlas with NOS tubes? Which tubes and what was your experience?
I did. I replaced the standard EH 6SN7 with NOS RCA 5692 red base. Amazing result. Now waiting for my Tung Sol 6SN7 to arrive. I will then try to see which is better.
It is nice to get a response even if it is a year later, thank you. I have also rolled in some NOS Sylvania 6SN7's to good effect. They really opened up the sound stage and provided more bass definition.
Ferrox....How did you Tung Sol's compare to the RCA's?