+1 Would definitely like to know what amps you were using. Very nice impressions indeed. It's interesting that you prefer the TH-600 over the 900, although I can definitely understand why after comparing both with a variety of genres.
Definitely makes sense to me too I have to say. When I got to demo the TH600's I immediately thought about the TH900's and thought to myself, how could anything else closed sound as amazing as what I'm hearing right now. I used them with the ALO Pan Am and figured that if the world was ending and I had one setup to play before the world exploded that would be it right there. I know I've never heard the likes of the LCD'3 or top level Stax and what not but I honestly don't care. The TH600's were to me and my preferences of music the best sounding headphones I've ever experienced.
Now as I sit here listening to my newly aquired D7000's I wonder if anyone here has had to chance to AB the two and what their impressions were and which they prefered. I've now owned all the old schools Denons and to me the D5000's were easily the most exciting and the D7000's I've yet to experience through a good amp seeing that my Arrow 3G just take a crap and I sold my other ones thinking that the Arrow was all I'd ever need I do have a couple of my favorites heading home tomorrow with the Fiio E12 and RSA SR-71a which to me is the the best sounding portable I've ever owned top to bottom. Others have better mids (Continental V3) and better bass (Arrow 3G) but non of them come close to putting the total package together like the SR-71a. But once that gets here I feel like I'll get a much better idea of what I have here with the D7000's. If I feel like they aren't giving me what I was hoping for they'll be up for sale and I'll finally do what I should have done a few months ago and get myself a pair of TH600's and call it a day!