yeah, I had the TAD EL34B stock in my Herbert too. I think they're an ok tube, pretty well balanced overall. Like mentioned, they are just select versions of the Shuguang, just like Ruby. They sound great in the right amp. I like the Tungsol EL34B quite a bit too, nice tight bottom end and a lot of bite in the mids with an interesting growl. They really do exhibit some 6L6 qualities like the descriptions IMO, while still sounding like an EL34 when pushed. The SED Winged =C= are still probably my favorite EL34 however, they have a real nice complexity in the midrange harmonics when you push them, and the bottom is still thick without going out of control. They are also the most reliable EL34 tube I've tried. They seem to just lose their sound qualities and volume when they are shot, rather than shorting out and red-plating like a lot of others. You can literally run those things into the ground if you needed to.