I run 300b's currently and do like what they give in the midrange I like the Gold Lion 300b best ( I will never be able to afford NOS 300b's). But I would say 6550's are one of my fav's they just seem to get the music right. I do like the NOS 6550 best though I found many of the modern ones a little dry sounding but it has been a few years since I had a amp that used them.
What is your favorite tube type?
With so many tubes that do different things and have different sound profiles, what is your favorite? EL34s wonderful PRaT, KT88/6550s smooth and dimensional sound, lush mids of a 300B, detail of a 2A3 or the huge soundstage of an 845? I am curious which is your favorite. What do you like about it?