I picked up a pair of Bose Quiet Comfort 2 headphones on the recommendation of my friend Vic. In the interest of full disclosure, Vic is an employee of Bose in their product development group.
First off, these are really good headphones. I never liked ear buds for either the comfort (or lack there or) or the sound quality (or lack there of) These headphones will remind you what music is supposed to sound like. They might even cause you to go back and re-encode some of your music for better quality.
Recently I flew across the US and back. Over ten hours in noisy aircraft, including a small turboprop plane. These headphones really cut out the loud white noise that exists in passenger aircraft. These are over the ear headphones, as opposed to on the ear headphones, like the Quiet Comfort 3 headphones. For traveling, I prefer the over the ear because they are less likely to move off my ears as my head moves while I am sleeping on a plane.