Funny, I have a completely different take on these phones. I originally bought the AD900 and hated them--just no midrange. Months later I was persuaded by favourable reviews and a cheap price to give the AD700s a go. I hated them even more and sold them after a week. Recessed midrange, no bass, terribly grainy, coarse treble; to be honest, if I'd been told these were $50 supermarket phones I'd have believed it. Plus...they creaked outrageously; that alone would have ruled them out for me. The slightest movement of the head....huge creak.
I really don't know why I have such a different reaction to the majority. I used to enjoy my AT911s, so I'm not anti-Audio Technica. But this new line just doesn't get close for me.
To put these comments in perspective, I listen to mostly classical and presently own Senn HD650s. Now that's a phone!