I was waiting for Noam to finish that review of 300B tubes. I wanted something really good that cost less than the other premium tubes out there. (Not that these are cheap, but compared to some of those other really high priced ones!!) I was using Electro Harmonix and JJ 300Bs in my two amps. I knew the JJs were the better of those two. When I plugged in those Gold Lions and they warmed-up....it was a No Brainer; these are really good tubes. They do everything beautifully. I can't imagine that those other high priced tubes will do much, if any, better. The Law of Diminishing Returns starts after the Gold Lions.