Hello fellow Vintagers. This is the first post for me - just joined today. I need some advice please. I have a pair of SDA 1's. Bought them in 1989. They are wonderful. I am ready to move into the surround sound arena. I need to buy surround speakers and center channel speaker. I also am in the market for a A/V surround receiver to drive the setup. Any advice on speakers and A/V receiver?