Save some dough. Try the LAT international top end speaker cables. An 8 foot pair new will set you back about $450 bucks. I have them (the older version not the latest) in my reference system. They are outstanding.
Cables definitely sound different to me. However, given the performance I get from the LAT silver/copper hybrid cable - warm, silk smooth, holographic - I don't see much reason to spend oodles of money on higher end cables. Have I heard all of them? No. Are they the best cables out there? Who knows. But do they sound fantastic to a very critical listener who hates "digital" sound. Absolutely