I bought 2 DC`s about 5 years ago and they still look and perform as new.
I cant fault them. I have used others (cant remember the make) but nothing else felt right for me.
They are also so popular that compatabilty with your flying friends should not be a problem. I remember taking a flight with a friend who wore Bose-X and the two were hopeless together so he switched to my spare DC (reluctantly), he complained bitterly about it but at least we could hear each other.