I currently have a Musical Fidelity B1 driving my Rogers LS4a stereo speakers. I want to move to a surround setup whilst keeping the B1/LS4a combination for hifi and as the front l & r in surround. What would be a good amp to drive the centre and rear speakers? I'm thinking about a Yamaha AX750SE or RX-v1400. What would you recommend, to work well with this existing setup? Also, how on earth do I wire this lot up and set it up to get everything in balance/sync. Any help appreciated!