Have tried them all now, after reading all of your fine reviews,,,,, whew,,, what an experience!  HD-650, DT-990, AK-702, AD-2000, AH-D7000, and of course the HD-800.  First, I am in complete agreement with SKYLAB's review,, remember it's mostly positive and I will write more later.  My initial impressions?  Give me the AH-D7000 with it's wonderful smooth, articulate mid definition, and a bit less "over" bass, give me the even consideration of the DT-990 with more of the air that the HD-800 offers and a whoop of the .AH-D7000 bass, and finally...