I have about 25 solid hours on the speakers now. Out of the box, they were a little stiff but sounded pretty good. The potential was obvious.
Now that I have played around with position, further apart and more toe in, and have a few hours on them, I would say they are excellent performers. I am very happy that I took a chance on them. They are very engaging and dynamic, two things that are a must for me. And the bass is very similar to that of Danny's OB servo controlled subs. I know that things will get better with more break in, so I'm definitely looking forward to that.
Someone should start a thread for new X series owners to post their thoughts now that quite a few pair are out in the wild.