I have just trialled a pair of DC X11's, our work got some down for a trial for us. (Flew the GA8 with them).
Overall the ENR wasn't all that impressive, I think if you were able to clamp them a little tighter to your head, they would be better. BUT the clairty you get from the headphones, and the mic clarity on the PA is amazing.
We also got a set of H10-13X ENRs down as well, but the speaker/mic combination isn't as good as the X11s..
I would love to try the Bose soon.