I have a Rotel RSP-1066 with RMB-1075 (120W or 130W X 5) for my Studio 100, CC and ADP. Is it worth it to Bi-amp the 100s and add a smaller amp for the rear? What differences will I expect to hear? Do I need any crossovers or will I any kind of calibration for the woofer to match with mids and highs? Thanks!