I am interested in learning a bit more about speaker cable. Everything I have read has stated that there are a lot of snake oil salesmen out there, but no one really seems to list who they think these snake oil salesmen are and why. How much difference does upgrading speaker cable make? What level of components is necessary to hear the difference? And finally, what brands are worth it and aren't. It seems like Monster Cable has the market cornered for the general public, but are they any good? Thanks.