Argedee wrote: "I've got a pair of Audio-Technica electrets (ATH-7), and am in love with the detail, and airy spaciousness; I might prefer them for acoustic music over the HE-6. I'm less in love with the comfort (the cups are at fixed angles and the pads are on-ear)".
I was just at a meet this past weekend in Seattle and a Head-fier whose name I never got showed up with a pristine pair of ATH-706 cans and amplifier, in its original box and with "just printed yesterday" quality user brochures. But I simply couldn't bring myself to listen to them because I knew the small pads, barely covering one's ear, were going to leak alot of the headphone sound and ruin the ambience in the room, as I tend to play pretty loudly compared to the rest of ya'lls. If I get a chance to be alone in a room with them...I'll write back.
BTW, how much do they go for? I saw very few posts about them on Head-fi, with a pristine pair going up for sale back in 2009 (which I think may be the one I saw).