has anyone had the BOSE quiet comfort 2 or 3? i tried it on in apple store, the noise cancelling is quite interesting... i was not able to try the sony version of the noise cancelling headphones can someone who had one or both of them give me some comment on how those perform? battery life? what's the difference between 2 and 3? (please don't just call bose rip off unless you have both the BOSE and some other brand to compare) Thanks!