I have a Pioneer VSX D810S A/V receiver using pre-outs to a Carver Premier THX 5-channel amp with Tannoy speakers and an AR subwoofer. Having just read the ICBM review in Sound&Vision, and read the manual, my question is: do I really need the ICBM? Also, I have two DVD/CD changers...Toshiba & Onkyo.