I have a 135 watt Twin Reverb that had two tubes yanked and was biased properly the other day. I have it powering a single JBL G125-8 and love the sound I'm getting. This thread isn't about which sound is more pleasant to one's individual tastes, the mellower-sounding original speakers or the JBL with its sharper edges. It's about tubes. I primarily play simpler rock and roll. Can anyone recommend a make of tubes that'll give me a good, ol' Sex Pistols sound for a somewhat reasonable price? Tubes that'll start to distort in gradual increments instead of abruptly? Unless I go out on the occasional Adrian Belew limb, which I do every now and then, I usually use very few, if any, effects when I play. Now I can get some sound I want without killing everyone around me. But, since there are currently cheap-o Chinese tubes in the amp, I know it can be better. I'd like it to be well behaved in a predictable, controllable manner. I wanted the amp halved because it was just way too damned loud before. My girlfriend went pale when she first heard it turned up. Is there anyone here with some experience in using two instead of four tubes in a Fender who'd have some suggestions as to what would be a good tube for my purposes? Think of the solo in Shake Appeal on the Stooges' Raw Power. Thanks for looking.