Classic rock indeed
Admittedly I have not tried any other EL34 in my amp, but I have done a buttload of research and listened to way too many sound clips.. and my verdict was that when using power tube crunch in a marshall-type amp, these do great at giving you the tones of old. Reminds me of Angus & Slash.. not a lot of lows, just really epic mids and highs. Not harsh, but just solid classic rock. If you plan on keeping the power tubes clean in your amp setup, it really doesn't matter as much because before clipping power tubes tend to be pretty similar no matter the tube.