It's interesting to see so much positive feedback about the edition 8s.
I had the opportunity to listen to them for many hours and feel that Ultrasone should not be charging 800, much less 1500 for these headphones. Yes, I felt they were great closed headphones- better than most I've tried. However I didn't think they even competed against the likes of the hd800, O2, or K1000, all of which can be had for less than the ultrasones.
For the price point, I'd say the Pro 900 is a much better deal. Edition 8s just didn't do it for me.