+1 on this deal.
I recently acquired an HD 600 and I really like these headphones. I think they are very well balanced with excellent clarity and they are very comfortable. I did a bunch of research before buying them, and I'll quote what someone else wrote: "These are the reference's reference."
BTW, I've PMed this seller a couple of times and I'll add a +1 for his honest thorough input.
GLWTS