Hey Ahzari, glad you got to try out the TH900. It's a great headphone isn't it?
I know exactly what you mean when you say it didn't "wow" you but that it was still excellent. It's the same kind of reaction I had when I first listened to the SR-007 as well. The more time you spend with it however, the more it charms you I think. Right now I'd say it's definitely my favorite dynamic headphone, ahead of the Signature Pro, W3000ANV, and Qualia.
I'm VERY curious about how the TH900 performs with the Super 7, especially compared to the ZDSE.