@Frank: very nice review. T90+WA7 combo is downright dangerous. I spend far too much time enjoying my music library when I should be doing other household tasks. For a change up I'll sub either HD800 or HE-500 for an alternate but equally satisfying experience. The T90 doesn't work for some ears, but for those that it does, the WA7 allow them to sound stellar.
The T90 and the WA7 have a very special synergy. They are made for each other.