Hi My name is Hari. I recently brought one Denon AVC-A1SRA. I am playing it with KEF Reference Front Channel Series 205. For rear I brought one set of KEF Q11s. I burnt all my money. I need set up a Sub, Center and Surround A, and surrount rear b. Can somebody suggest me if B&W center can match? What is Timbre Matching? How do I do? Sometimes I feel this Amp (275W per channel) is insufficient to drive my KEF 205. Should I put a Seperate Power Amp? I am using Onkyo 757 (THX certified DVD player) Thanks in Advance, Hari.