Roberto Covezzi is really doing something, with his silver cables...
I recently purchased from him some sets of Mundorf's Silver/Teflon/cotton cables using the Eichmann's Silver Bullett RCAs.
The building philosphy is the following: http://www.venhaus1.com/diysilverinterconnects.html
The sound after inserting these cables didn't change... it - surprisingly - only get better than it was in some parameters.
The above quite "strange" sentence means that these cables apparently doesn't change the sonic soundscape - i.e. more bass, mids or trebles... but they keep the good qualities of the system balance, "only" enhancing spatial separation and dynamic micro & macro slam.
Respectful and impressive.
I listened to my system yesterday evening and was surprised at the clear, detailed, smooth, lively quality of music.
... as a plus, some hum I had from my Partrdige/300B monoblocks... zut! Disappeared... I fucked Eddy and his Current;-)))
Just kidding, folks...
A Best Buy, indeed...