This subject was touched on briefly in another thread, but I think it deserves its own topic. I have two sets of speaker cables. The first is plain OFC copper bi-wire, 12 and 14 ga. The other is silver-plated copper wire, single connectors (not bi-wire). I've heard contradictory reports about silver. Its my understanding that pure silver wire is good, but silver plated copper wire is bad. Is this true? How would experts rank the various types, i.e., solid silver, hollow, plain copper wire, etc.?