I hung up my David Clamps several months ago and chose to go with the Bose X. I absolutely love them, but the price tag was very steep. I am also on the Dash and the added ANR is extremely beneficial. That being said, if I were to do it all over again, it appears that Uflymike has their TSO approval and at half the price of the Bose X, I think I would have gone that route. Apparently from the crews I talked to; they love it. Just some food for thought.