Hi!

I own the same center, and I also have a pair of matching bookshelves that I was using as surrounds, but now in my new house I don't have the room for them, so now I'm in the market for a pair of QS4 to replace them. I just hope the QS4 will sound as good (or better) than my current AX 1.2's.

Anyhow, to answer your question, the AX 1.2 would be somewhere between an M2 and an M3.

..Paul