Comment Lightspeed Zulu (Score 1) 110
The Lightspeed Zulu is a headset designed for airplane and helicopter pilots, but has a bluetooth interface. It has active noise cancellation that's much stronger than that of the Bose QC series, and it also has a music input if you want to pump in an iPod. I've used the Zulu's in a helicopter sitting on the edge with the door removed doing aerial photography, and when calling someone else they couldn't tell I wasn't sitting in a quiet office. Truly unbelievable. They're about $850 though.