I'm a little biased given that I own the W1000X, but it seems like a pretty decent complement to your D7000 given their forward midrange. It's definitely not an upgrade though. From what I hear, they are at around the same level in terms of sound quality.
You could also look into the Edition 10 though those are like $1000 more expensive than the edition 8 lol
They're really worth a try. I haven't compared both directly, but to my recollection of the D7000, the W1000X is a much livelier and more vocal-centric headphone yet it doesn't skimp on the bass as so many ATH woodies have in the past. I like the W1000X a great deal more (which is why I own one instead of a D7000, of course) but I can really see them as being identical in audio quality (build quality goes to the ATH).
While it doesn't isolate as well as my K272, it definitely isolates far better than an open headphone. I wasn't able to listen to Grados in the same room as my wife while she had the TV on before, but now we're both happy with our respective medias.
Edited by Mercuttio - 4/2/11 at 10:27am