Cool. Thanks for the opportunity, guys! The three things that set my current favorite headphones apart are:
1) Form factor: They're custom IEM's, very portable and comfortable.
2) Sound (duh): GREAT bass, not too much of it, 'warm'-ish sound signature, clear highs. Actually clear everything...
3) Customer service: I had my customs re-moulded by the original manufacturer, who gave me the same great customer service and warranty as if I'd bought a new set.