The 7591 was a somewhat popular amplifier tube in the '60s. Mcintosh, Eico, and Fisher used them in some of their amps. Was just wondering which is your favorite sounding 7591? I believe Westinghouse made them for the EICOs, not sure about the others. I've heard good things about the new EH 7591, altho in general I always think that vintage tubes just sound better. Whats your opinion?