Gjkphd, some time ago several folks posted about comparing circuit breakers to the old style screw-in fuses. Their conclusion was that the old-style screw-in fuses sounded better, and that the even older glass fuses sounded better than the "newer" ceramic ones. I've never experimented with it, so I can't comment from personal experience.
That said, a major improvement from what you have today would be accomplished simply from pulling, cleaning and then reconnecting the applicable electrical cables, including the primary feeds, in your electrical panel (definitely professional ELECTRICIAN time). If you move forward with the dedicated lines, you'll get this automatically from the new lines. But while you have the electrician in the box, pull, clean and reconnect the mains lines and ground line as well. If you additonally apply some Walker Audio SST contact enhancer as you re-make the connections, you'll get an added improvement.
That said, a major improvement from what you have today would be accomplished simply from pulling, cleaning and then reconnecting the applicable electrical cables, including the primary feeds, in your electrical panel (definitely professional ELECTRICIAN time). If you move forward with the dedicated lines, you'll get this automatically from the new lines. But while you have the electrician in the box, pull, clean and reconnect the mains lines and ground line as well. If you additonally apply some Walker Audio SST contact enhancer as you re-make the connections, you'll get an added improvement.