I was looking to upgrade my amplification. And was torn between two amps either the Harmon Kardon signature 2.1 or the B&k av5000 series 2. I'm running Martin Logan Montages for fronts and ML encores for the center and surrounds. However I would like to upgrade the fronts to either the Motion 10's or 12's soon. And then possibly add some bi/dipole surrounds for the back. I have a old velodyne sub-woofer. So the fronts would be crossed over for bass duties. And then I would just run the surrounds with the receiver. Thanks Greg