I have a SVS PB12-NSD and I am a big fan. However, on Dancing with the Stars the sub works overtime and becomes so overbearing that I have to turn it off in the setup. Dancing has a pretty bass heavy drum in the music even without the sub on my m60s, but maybe what I am hearing is actually the mid bass hump that you are talking about. Anyone else have troubles with that show? Is it my system or the content? I always just figured it was the content. But I do tend to run my sub 3db hot. It has never been a problem except on this show.
On a side note, the SVS hits so hard that often there are times when I don't really need it. My wife sometimes gets mad when I watch a movie late at night. Without the sub the m60s are able to hold their own for night watching, but it takes time to set up the crossovers in the Onkyo 875 receiver. Is there a way I can get a one button setup to turn off the sub and make my m60s full range?