The M^3 does the job nicely, but is outmatched on nearly every level by the Yamamoto HA-02. Nearly all the complaints I've heard about the W2002, in fact, are addressed by the HA-02. The M^3 provided a full, supple, almost luminescent sound, but its superb mid bass lacked extension into true low territory and sometimes had the W2002 producing the feeling of bass without actually creating the full note. The M^3 also left the W2002 sounding very closed-in and in comparison to other (open) headphones as well as open-sounding closed headphones like the W5000, somewhat artificial. The three-blob soundstage was also in full effect. The HA-02 infuses the W2002 with a more open, airy quality, reduces or eliminates the three-blob soundstage and produces big, deep bass notes to tell your stereophile friends about.
Edit: With a good source I also thought the revised EC/SS sounded quite good, and this was in direct comparison to the HA-02.