Go to Soundstage (or ecoustics.com) to find a review of the PSB M2. At the end of the article there is a comparison between the M2 and the Paradigm S2.
I'm not advocating these over the others on your list, since I've never heard any of those you've listed. But it should help to point out differences between the M2 and S2.
BW MaxxC
I'm not advocating these over the others on your list, since I've never heard any of those you've listed. But it should help to point out differences between the M2 and S2.
BW MaxxC