I'm seriously thinking of getting the HC6 system but I have a question. Can the sats be wall-mounted? I read in one of the reviews that this might be an issue. Anybody have any experience with wall mounting these speakers? And assuming they can be wall mounted without any ill effect on the sound, how far should they be from the wall? With the wall mount brackets I currently have, the back of the speaker would be about 3-4" from the wall. Is that enough? thanks!