Just to let you guys know, I listened to a lot of vocal recordings on M2's, including the Queen, Fugees, Diego de Cigala (Bebo & Cigala, look it up if you haven't heard, it'll blow you away), plus some piano and classical guitar recordings.
In summary, M2's are far more balanced tonally than Mythos! More natural. In direct comparison Mythos exaggerates treble, it's too forward, although some people may prefer that.
Well, I hope that helps any people in the future searching for "Mythos" on these forums.
In all honesty to DefTech, Mythos are excellent speakers, and have a far greater WAF than Axiom, or any other speaker brand for that matter. So you most definitely won't be disappointed with Mythos, but if you're OK with Axiom you'll get more balanced speakers for much less dough.
That's it! Signing off...