I have to disagree. Cables can make a difference. There are two extremes, those that think you need thousand dollar cables to get the best sound, and those that say cables make no difference. The middle is probably where the truth is. You do not need to go over board, but I would not recommend using cheap stuff either.

Think of it this way, if you have a cheap cd player and swap out the cheap capacitors for better quality ones you will hear a difference. The same is true with cables. The quality of the medal (copper or silver) will affect the sound. Also a lower gage (thicker cable) will have less resistance if using long runs.