have any of you guys heard a home theater set up with two speakers taking care of the rear surround channel. I have noticed some recievers allow you to split the rea in a 6.1 setup with the 6th channel's power into two speakers. It seems like it would be a bit more enveloping but would the volume and sound not match correctly because say a sound is traveling around the surrounds and it goes from the left surround powered at say 100w then to the left back surround say powered at 50w than the right back powered at 50w then the right surround powered at 100w. It sounds like there would be a huge difference but I'm wondering if any of you guys have heard a setup like this. Is it better to just have one speaker for the rear back?