I fly only pistons but my Lightspeed 15XL's with ANR are quite satisfactory. They are cheaper ($350) and I find them perfectly adequate in noise performance, durable at 250 hours, and comfortable enough to go about 4 hours without noticing which is more than I can say for the Bose. The Bose were less comfortable and cost 4 times as much so I don't get the point with them. I had to open up the headband on the Lightspeeds a little bit and flex the steel band out to make them fit right when I got them, that took maybe 20 minutes. Without a certain amount of dead weight passive headsets cannot kill much noise and as long as you have dead weight it inversely affects comfort. The 15XLs have a battery-saver thingy and battery life leds.