Cal, thanks for the info on your silver cables. They sound special indeed. I have the Clear Day as mentioned and also some Dueland silver. Both impart a slight ringing to high key piano notes being struck sharply and a little fatigue listening to massed strings--to my ears anyway and in my system with speakers that no doubt still have a ways to break in. Right now I like the copper although I can't even figure out which amp I like better. Maybe this is why some folks have more than one amp?
But boy do these puppies sing.