Mikeaudio, those of us with the MM3/MM2/dart are curious about your comment;
As much as I hear that these speakers don't need much power to drive them, I believe you need, certainly more than 100W, to play them load enough to enjoy Rock music. So I found Dartzeel Amp to run out of steam with in this situation
maybe describe the music and some specifics about what did or did not happen. i'd love to try that same music in my very large, well damped room and see what happens. i can tell you i've played AC/CD, Led Zep and lots of other very agressive rock at concert volume levels in my room for large groups of people and the whole room was alive and real. the dart just rolled along.
i can get the 'eyes' on my dart to 'blink' very very occasionally when i'm doing 'warp 9' at about 110db on torture test tracks......but never in any actual musical situation. and even then; there is no hardness or edgyness evident.
i would agree that having more headroom might be beneficial very occasionally; but not at the expense of losing all the other unique attributes the dart alone brings. but maybe that's just me.....others may choose many more megawatts and less refinement.