Bose
If you live near boston, you can call tech support and get the addy for the repair location. When you go, the tech comes out, goes over all the issues with you, generally asks how you like them, and where you would like to see improvements. They take your headset back with them. 25-30 minutes later they come out all fixed, mostly all new parts, new seals etc.
The last time I went in, they extended my service warranty an additional 2 years for doing a small survey for them.
If you have to ship it, they used to cover fed ex in and out... less than a week turnaround.
Bose support is second to none in my opinion. Also, they may not feature much, if any passive noise reduction, but the tri port thing they have going actually reduces the high freq. noise... makes it sound boomy and loud, but you can still hear normal conversation well.
I seemed to get about 35-40 hours of use in the 1900. prob. closer to 60 hours in the Q on a set of AA's... and the only time I turn them off is when I pack them on a plane swap or at the end of a day.
I did have hot spot issues at first, but learned that if i put the headband further back it went away.