I think that is a pretty good discription. I also did not notice a huge difference between the LFRs and the M80s when playing music in one of the surround modes. But I really think they open up a lot more in stereo. And the bass is quite impressive.
In surround I don't think that is a knock on the LFRs but just speaks to how good the M60s and M80s are. But I am still playing around with positions and settings to see what works best. Also I am not in a very big room right now (16 x 13), but sometime in the near future I am taking out a wall and will be in a 16 x 23 room. I think that may make a big difference also.

Will try to post more in the next few days, but my time is a little limited for a couple days so won't be able to play much.