Can anyone suggest a really good pair of noise canceling headphones? By default, I'm thinking the Bose QC15s (please, no one needs you to Bose bash), but Sony has a couple of offerings (ND500, ND60) that look interesting. Mainly, I'm looking for (1) comfort and (2) noise canceling. Not have really crappy sound is important, but I've never owned a pair of professional earbuds or anything, so I'm not expecting anything beyond "good" fidelity. The ND500s are around Bose price (but you can find them cheaper, unlike Bose). Anyone have any other suggestions?