Poor Quality Bose
If you go out and spend all that money on the Bose product, don't expect them to last. I spent the money on some Bose QC2s which fell apart at the cheap plastic part joining the headband to the cups. I'm not alone. See here http://getsatisfaction.com/bose/topics/warning_bose_will_not_repair_or_replace_broken_qc2_headphones. Bose will tell you that they have improved the design in this area - they won't repair my pair because they are the improved design!