I already have a RC62, I may want to upgrade to the RC64 in the future.. I'm located in Canada and its a special order item and quite a bit more expensive. I can get another RC62, and for the both of them it would be cheaper then buying an RC64. Would it be overkill to buy another RC62 and have them linked together for the center channel?? Onkyo 876 reciever with (2) RF82, (2) RS52, (2) RF15, (1) RC62 and SVS PB13 Ultra. Thanks