Just bought the Telex Airman 8’s. Upgraded version of the 850. I used to have the Bose X and Light Speed at my regional days I’ve been using the ship sets (Telex 750 ) for the last 7 years. I’ll post a review when I get them and use them. Lotta info out there. With shipping $415. I’d say anyone seriously considering the 850 just go with the updated airman 8.