I'm looking to get a pair of good headphones and I quite like the idea of noise cancelling so that for train, plane and even long car journeys I can hear less of the outside world and more of my music.
I also do recordings and mixing and I wondered what if anyone could tell me how these headphones translate the sound if you own a pair, i'm looking for a flat, true sound, if its got a bass boost or any kind of boost they won't do for mixing. (I know that its much better to mix on good speakers but I don't have the option to do that, hence why I am looking to get good headphones instead).

Thanks in advance