Since I just commented on the AHD7000 in this thread I can as well copy it here.
http://www.head-fi.org/forums/f4/my-...77/index2.html
I have the opportunity to use a Denon AHD-7000 for a couple of days.
That thing does very well. It has none of the weaknesses that I see with my 4 phones. I really like the clarity and to be honest I like how loud it is even with moderate amp power. It also has the present, shiny but soft highs I like.
It is not quite perfect, but it took me until the second day to find things that the other phones would do better. One AHD-7000 weakness is snap in the mids. This is most noticeable when listening to rock with very highly engineered drum sounds. Namely, the snare in most Toto songs comes out better in the 250 HD. David Paich and buddies obviously spent hours on the snare on Isolation's "Mr. Friendly" and it is a little lost in the Denon.
I also found that some Kamelot songs, when they get more percussive, don't really fit the Denon. When "March of Mephisto" gets heavy at the end it gets mushy. The 271 does this pretty well.
Van Halen's "Ain't talking about love" comes out too "woody" in the Denon, the Beyer shines here.
[references are to a Sennheiser HD-250 Monitor (not "II"), AKG K 240 Monitor, K271 II and Beyer D770]