ughgh I'm so excited! I want them so badly >_<. I think every day I just go look up stuff about the HD650 and get myself excited. I was looking at what people think of Michael Jackson and J-pop on the HD650's today. I used to be discouraged sometimes about the headphone when it came to detail because people and the whole "veil" thing but nowadays I just hear that the HD650 is quite detailed, it's just it doesn't present all of them in your face like some brighter cans will do. Then again, I'm coming from an Audio Technica M50, so the level of detail is vastly increased from that alone!
I also remember some time ago, an HD650 owner here who wanted to sell his (he was a russian fellow I believe) was at a meet and I let him use his HD650's on my amp and he loved it. Maybe I'll be in luck. I also remembering the guy who made my amp tuned it using an HD650 or HD600 as well.