Recently, I changed the original master cylinder, which I had been using since 1995, as it had failed and was leaking brake fluid. I replaced with the one from David Silver and I have to say it has transformed my brakes, much better feel and stops more quickly.
Another useful addition has been stainless steel replacement caliper piston. Saves the almost annual caliper rebuild.
Braided hose is a sensible choice too. Obviously, not period correct but I think worthwhile.
Pads are EBC Sintered.