I use Silver ICs from CatCables for Interconnects between my Rotel preamp, poweramp, and CD player, as they sponsor Club Rotel, SignalCable bi-wire 10g speaker cable. BlueJeans Cables are highly recommended here for a good value/price. You can also consider Axiom cables, since they will be shipped free to you, together with the rest.

Axiom M60s, QS4s, VP100 Onkyo TX-SR804 Oppo 970HD Rotel RB-1080/RCD-1072 REL Q150E sub, PS 3