I own the David Clarks. They are great for a couple of hours then they start to hurt a little, bit like squeezing your head, however as Gomer Pylot said DC service is great. My set had a problem so I sent them back to DC and they tried to repair them. In the end rather than waste the time fixing, they just sent me a brand new set. Great service!!
On the other hand, I just did a ferry flight where the owner had Bose headsets. Two of us flew for 13 hours and I didn't even feel like I had them on! Not sure they could take abuse like DC, not that I do abuse them that is
