I just bought a Lightspeed Sierra headset expecting to find a large difference with the noise level when compared to my old headset. I was disappointed in the passive noise reduction of the headset. I am in training flying Cessna 172s mainly and with the Sierra I could hear the strobe lights and most other things rattling around in the cockpit. With my cheap ASA headset i heard none of this. Does anyone have an suggestions to what headsets have the best passive noise reduction with or without ANR, it doesn't matter. Im just looking for something comfortable like the Sierra, but better passive.