Pros: They look like something out of TRON
Sold me Edition 9's because of these because they deliver a bigger sound stage and all that compared to the Edition 9's. Maybe it's because the Edition 9's are closed headphones. Whatever they're my 2nd favourite headphone after the SR-009.
"Just not as good as the HD800" is an understatement. Ed.9's are NOWHERE near as good as the HD800's. But then again everyone's different and maybe they'll float your boat. When I first heard them they were like that to me but when my HD800's came around I tried the Ed.9 again and my Ed.9 boat was nothing but an irrecoverable wreck. Anyway for the price of $1450 USD buy them if you want to stay dynamic otherwise save up, sell a few organs or whatever and go electrostatic like me. Even better... Visit someone who has both setups and then decide what you want other than taking a risk because that's a lot of money (to normal people like me anyway).