Check the safety section of this forum, lots of conversation about headsets.
I have had the noise cancelling, did not like them. I currently have the new version of the worktunes.
IMO, get the digital tuner version. Frankly the tuner is marginal at best. The Ipod connector is cool, but you will have to deal with a cord, and at that point there might be better (yet very much more expensive) headsets. For flying, I love my bose noise reduction headsets, but man, runing over a $300 headset is too much of a risk...
So, IMO, the Peltors are OK, They never get too loud that you can't hear what is going on, but to each his own. Get them from a place you can return them...