Hi,
I used to have my RX6's biwired with QED Silver Anniversary bi-wire but needed some flat cable so changed it for single runs of Belden cable . I use link cables made from the same stuff rather than use the metal ones supplied with the speakers although I did use them initially.
Have to say I couldn't tell the difference between the cables and the links in any configuration, so in my opinion bi-wiring them makes no difference at all.
HTH
Steve