Robhow,
I have a pair of gloss-black Mzeros which I've owned for almost a year now. They are truly diminutive in size and designed for those looking for excellent sound in the smallest of package.
The Mzeros share a similar sound with the larger Axiom monitors. To my ears, they outclass the bose variety by a clear, country mile. If cute, tiny, musically appealing satellites is your thing, then the Mzeros ought to do quite nicely.
The Mzeros, in 2-channel stereo, cannot fill a medium-sized room with big-room sound. Heck, they sometimes struggle to do so in a relatively small room. Tonally (midrange and treble), the Mzeros are spot-on with the larger Axiom monitors. And when listening in the near-field, they are just as impressive.
But these diminutive wonders (like all satellites) are truly devoid of any kind of significant, low bass information. A sub of any kind is necessary. Moreover, the crossover between speaker and sub shall have to be set higher when using satellites.
If your space requirement provides room for slightly larger speaker enclosures than that of the lilliputian Mzeros, then the M1s would do you better -- better in terms of fleshing out the sound within the room; and better in providing a more seamless integration with a subwoofer. I believe also that the M1s come with provisions for wall-mounting, if that is of concern.
Good Luck!
p.s. - I have been enjoying my Axiom AX-3's (Series II) for the past four and one-half years! I think they're pretty awesome too.
