So... here's something you don't see everyday.. I moved from the HD600 to the HD800 at the beginning of the year.. and now, I'm moving back to the HD600. I still love the HD800.. it's most definitely a more technically capable phone.. and the most impressive headphone I've heard to date (no, I haven't heard the 009, though)..
..but for some reason, the HD600 is calling me back.
Good for you! And I can totally understand where you are coming from.