I have used the calritys for several years. and love them. I used them on a King air 200 and now on the Saab, both of which are louder than the Dash, and I have no complaints. I have also used the Bose anr, and I feel that the little extra noise is well worth the added comfort.

As far as the TSO goes, save your money. There is no difference in the head-set. I contacted them to get this varified and the assured me they are the exact same you are just paying for paper work. Most carriers don't care one way or the other and they will never check anyway.

am holding on to my DC's though, they are like a good old friend