If you've got the dough ($299), get the Bose QuietComfort 15. I just got them myself. They have the number one, indisputable best noise cancellation of any headphone. You can certainly feel the bass as well. If you're an audiophile, sound quality won't impress you too much in a quiet room. But in any noisy environment and these cans truly shine. Most noise is cut out. I say "most" because with NC on and no music playing, you'll still be able to hear conversations as the NC mics are designed to adjust their sound to frequencies they hear. They block out ACs and plane rumbles well since those sounds are consistent. Conversations are not, obviously. Turn up the music however, conversations can no longer be heard.
Still, the QC15s are the best NC headphones you can buy. They ate extremely comfortable and light, and come with a nice case, two cords (one with Apple controls and mic), and an airline adapter.
Edited by Empire1 - 8/8/12 at 9:58pm