Also, How bigger are the ear cushion compared to the Aviation X? is true that the clamping force is smaller on the A20's?
I have used the Aviation X in the past, and the audio quality was great! but since my head is darn big they where unconfortable for long flight.
PS. waiting for more info about the A20, I'm upgrading my loved DC 10-56 (they are older than me!!) with an ANR kit....
Cheers
Daniel