I have M200's on my desk and recently installed Axiom M3Ti's at my in-laws' place. That didn't afford a real apples-to-apples comparison, but here are my impressions.
The M200's are great for near-field listening (you already know this, I'm sure). What they don't have is a big sense of power, especially in the bass. They're a little weak for listening at a distance.
The M3Ti's are substantially physically larger than the M200's, have a big ol' port on the back, and in my installation were powered by a consumer-grade but decent Yamaha receiver. They certainly had a lot more punch than the M200's, and were well suited to listening at a distance. I liked the sound, but I felt it needed some equalization to sound correct to me. With the receiver's tone controls I reduced both bass and treble by 4db, and then they just sounded sweet. I had them placed almost in a corner, not far from the wall, so I wasn't surprised that bass needed to be cut, but it was a little surprising that they were too bright for me (detail-lovin' Ety 4S user). Anyhow, though I found them to be a little off, it wasn't anything that an ordinary receiver's tone controls couldn't cure, and they were really quite good after that.
For near-field listening I would stick with the Swans, which sound good to me from roughly arm's-length away. For greater impact (than I like) or putting them further away, something with more oomph than the Swans probably will serve better.