I don't understand it either, I would say my Grados get about 90% of my listening time while the HD800s get the rest.
Yeah, I can't for the life of me understand this?
I've tried (in home) LCD-X/HD-800/HE1K/400i/T1 and although they all sounded good (except the LCD-X to me) they have nothing over Grado and I would put them up against any of these HP's any day. Hell, I'm even worried I'm going to prefer my Grados over the 009/BHSE after all is said and done. And I do understand its a matter of preference, but...