The thing about the graphs; both of the top contenders are both Bose products. Althouth they are good, very good, the Light speed Zulu is better and cheaper than the Bose Aviation. I have tried them both, the Bose aviation is realy good, but the Lightspeed is better, The Bose "U Fly Mike" truely is a good deal, but to be covered under the legal FAA/PMA, you have to wear the earbuds that come with it. I had some serious interference with the window heat/ or other electronic wires when I got close to the window, which is VERY easy to do on the
747. Never flew a 737, so i can't comment on that. I can say with absolute certainty, I have heard stuff from my I-Pod through my Lightspeed Zulu, that I have never heard before, even through a good quality home stereo system!!
I have given the Telex 850 a good try; its OK, but not great. The Sennheisers have too much hiss as back ground noise to cancel out the ambient noise.
It's friday, I just got back from the pub, but thats my humble opinion!