I have the David Clark 13.4 and love them. They are superbly well built and last long and they are very comfortable for me. I tried the Lightspeeds and Avcomms for one flight or so and they did not sit well for me. If I don't have my DC's I ain't going.
I might have to take a look at the DC's ANR headset. But if you ask me, David Clark all the way! The service is unparalleled too.