Thanks for your report on the X-11. I would like to try one also.

I fly with a Bose, but it belongs to the company. I own my David Clark H10-30, which I really like. My H10-30, on which I installed DC's "Comfort Kit" has worked great for years, from my instrument instruction to flying 135. I think DC makes the best non-ANR sets.
I hate to see David Clark fall behind, and hoped the X-11 would have performed better.

Flying at my current job with the Bose has made a believer out of me. Bose products are exceptional. My H10-30s will set in the drawer unless I don't have access to the Bose where I work.