My experience with some tubes after a few weeks of burning and long listening.
JJ 6SN7 - Great tube! It sounds like the scene is closer to listener. Vocals are very intimate. I don`t know why, but I love this tube. It has specific tonality, which is very fun to listen to. It has great dynamic range. You can hear subbas with this one and highs are also more dominant. The sounds is full and sweet.
Tung-Sol 6SN7GTB - Better soundstage like JJ. It is more spacious sound with nice depth. It sounds very nice. Actually, my first thoughts was great. It has the ability of the wow factor for the first moments. But. I was boring after longer listening. There is missing something which is making my LCD-2C sounds amazing during long sessions. I really was bored with this tube. It sounds kind of dry for me.
PSVane CV181T Mark II - This tube has everything! It has that magic which delivers my JJ. That fun factor. And it has very nice soundstage and spacious sound like the Tung-Sol. So it seems like when you basically combine JJ with TS, voala PsVane. There is really no bad with this bulb. It just sounds awesome in every area. Great detail, great dynamics, great tonality, great soundstage. I am very happy with this one. This one is definitely a great choice! And it sounds amazing after a few hours.