Fair enough. From my personal experience, every person I know that has the Bose (at least a dozen people) I'm the only one who has had an issue with them. As far as the lightspeeds go, at least half the people I know with them (again about a dozen people, and not all of them have the Zulu's) have had some sort of issue, anything from structural faults (the yolks seem to be the most common problem areas) to electronic ones.
Older versions of Bose aviation headsets not withstanding, the Aviation X has been remarkably durable, at least for everybody that I know.