It's already been said but just adding another voice. Do not buy expensive audio cables. It's simple science that John's link can explain better than I. About the only mistake people make is using too thin cables on a long distance. Your 14g wires are more than sufficient. Spend the money on a bunch of new CDs or movies to enjoy.
My favorite conversation on this.
[store clerk to a customer]
You need these Monster cables, see how the center core is a tighter weave than the outside, this allows the electrons to travel faster so the faster high frequencies really shine through.
[Me]
Ahem, Excuse me. Do you mean the electrons will travel faster than the speed of light? Because that's pretty near how fast they are already travelling....."
