Haha, it's me (check out my signature). I'm selling it because I bought three headphones to compare and pick one, and I decided to keep the Q701. They're both great in their own ways, but they have very different sound signatures and I just prefer the Q701 more. If I could afford to keep both, I would, but I need to sell the X1 to buy an amp for the Q701.
You can PM me for other questions on it, if you like. I don't want to turn this into the classifieds.