Lightspeed - Recommended
I bought a Lightspeed ANR headset (I cannot remember which model) about five years ago to use while glider towing. I couldn't justify the price of the Bose X. I have been very happy with the Lightspeed. I borrowed a demo model for a couple of weeks, before committing to a purchase. On my first tow with it, I had to turn off the ANR briefly to make sure the engine was still making the right noises!
I have also found it very comfortable, much, much better than a DC, which never fits me well because of my large head!