I've had my Bose for about 3 or 4 years, and I can't imagine going back to David Clarks. Don't know how bad the CRJ is for prolonged amounts of time up front on noise, but the Bose has really quieted down the Dash8 for me. Had a recall come out on the cords, but the customer service department was on top of it and it didn't cost anything to get fixed.
Just like xjsaab I had the 'stress-fracture' problem on the plastic rod that holds one of the earcups on. Just paid the postage one way and it was fixed and returned in about a week.
Summary: Best Christmas gift I've gotten in a long time.