I too have tried many 6sn7 tubes over the years. My Rogue Metis Magnum pre-amp takes a pair of these tubes. Currently I'm using Sylvania 6sn7w short bottle black base. Out of all the tubes I've tried these are my favorite besides the metal base 6sn7w"s. I own most of the top rated USA tubes on the VTV shoot out list. For the ones I own I would say the ratings and descriptions of the tubes are pretty spot on. I'm lucky that I have a local guy that tests and sell tubes. I've known him so long that he gave me a pair of metal base Sylv. 6sn7w's to try out. The black base ones I have now sounded close enough to the metal I didn't buy them. The best non-expensive tube in my opinion is the GE 6ns7gta. It does a lot of things right for a relatively low price for an old stock tube.
