I thought I'd put it here also.
I've finally purchased HD-1 and it's the best gear purchase I've ever had... The production date of mine is July 2012. Serial numbers are *64 and *65, they're a matched pair - calibrated and tested before being shipped. These monitors are in a completely different leauge with Event Opals and Adam S2A, which I had previously. Frankly I didn't expect to hear such a difference... The sound is so natural, clear, full and effortless, so "3D" I can put the music apart like a puzzle. The ATC's were very clear and natural also, but not so full sounding and powerful. For anybody considering monitors in this price range I can't imagine anything better.