Broke down and bought myself a new set of headphones this week.  My old QC2’s still work, and I even recently replaced the ear covers since they were starting to fall apart.  But WOW…just wow….these QC 15’s are just night and day better than my old headphones.  The comfort is good, but the noise canceling….  simply indescribable.  Literally, I can barely pick up the wind noise as we cruise towards Chicago.  The QC 15’s are a big step forward by Bose!