I just got the Polk Audio RTi A5's with a Polk Audio DSW 500 Pro sub-woofer :D . I will be running them with a Sony STR-DG1000 which is capable of running in a bi-amp configuration. It is used for both, movies and music. My question is, is there any advantage to bi-amping the RTi A5's ? If I do that, I lose the ability to run in 7.1 config., but any audio information that I lose through surround channels 6 and 7 will actually be mixed with surround channels 4 and 5 . Anyway, I only have one blu-ray currently that has a 7.1 soundtrack, and almost all new releases are still 5.1 . I understand the theory of why you should bi-amp, but, are there any TRUE advantages to bi-amping as for as sonics go ? In advance, I want to thank all of you for your time ! Leon.