Don't know if they are the best but I just upgraded from my old Monster cable to AudioQuest Type 4 speaker cables and they just made another bump up in sonic quality--more depth and detail.
Biggest Baddest Audio Cables
Whether they actually sound better or not, I don't really care but I have a fetish for beautifully made, anaconda sized audio cables, especially with unusually well made connectors. Any ideas here especially where 2nd hand is a deep discount would be greatly appreciated. Thank you.