Best noise canceling headphones for travel?

[Railgun]

I'm not a fan of Bose either, but man, the QC20s are fantastic.

 

[Tiamat]

Just get the qc15. It is the only thing the company does right and outpaces the competition by a long shot.

 

[kevinboyd]

Even well-made products have the occasional glitch. High-quality earphones need to have high-quality support on the manufacturer's website. A variety of help options like email, phone and live chat support will put your mind at ease, even if there are never any issues with the product.

 

[IGBT]

A number of reports on google search indicate many of these phones develop hum for one reason or another. Any thoughts on this??