Opt for the full headset. It's borderline under normal conditions, you COULD get away with a jet pilot's headset - but then you'll get an 8 hour day flying a bird with the ANVS inop and you'll be using the craptastic over-the-ear Telex backup headsets. Dunno that a noise canceling headset is necessary, I used a Peltor Sport LE for 3.5 yrs and that provided enough passive noise reduction so far as I was concerned.