I have a Sennheiser HMEC 300 ANR headset. It's great, very comfortable and great noise reduction.
German made and about USD$500. Not the cheapest.
It is a bit hungry on batteries, but also can be easily wired into the aircraft power source.
I also have a Lightspeed ANR headset it also quite nice, light, good battery life, comfortable. And resonable price.
Lightspeed
Sennheiser