Good to know that the Belden 8402 RCA's are not that good. I was thinking about trying a pair for my phono pre to my BAT preamp since the 8402 XLR's sound great. I have a friend that bought the 8402 XLR's from Take five audio in Canada. They are Cryo'd and use silver connectors. He loves them too in his high end system. I bought mine from btpa.com with copper connectors.
Of course I tend to believe that cables sound different in different systems. Just like my XLR adapters did not sound any different between the $30pr and $125pr Cardas and a previous poster heard differences. However in a USB cable shoot out in my system there were significant differences among cables.