Thanks for the reply guys. I’m currently on the 73 and my 850 stopped working after about 10 years. I’m going back and forth between the DC Pro-X and the DC One-X (the One-X is very similar to the Bose headsets). While I realize the One-X would be total overkill for the Airbus I think it would be really nice in the 73. Long term I’ll probably stay on the 73 but wanted to see what was used in the Airbus just in case I switch over to it.