Even the silverface Twin is a monster amp, way better than any solid state amp of that era, and better than most of the new ones.
Have you tried using the amp with the master vol set way down and the channel volume cranked up? It's all preamp distortion, but it's still pretty good sounding once you dial in the eq.
Those amps have an amazing reverb.
Another thing about the later silverface Twin, it can pretty easily be back-dated to the blackface circuit configuration, it's mostly a matter of changing resistors in certain areas of the circuitry.