I use the Etymotic 4P (higher output with slightly rolled off highs re 4S) for exactly the purpuse you describe. They're great and easy to pack!
Which headphones should be purchased?
Which headphones are your favorites and why? What do they do well that others do not. I am looking for a pair of Headphones that I can take on a train or plane, so closed is probably the way I want to go. I have a pair of HD 600s and love them, but I can't use them in public. How are the Bose in comparison to others, I have heard great things, but not from audiophiles, thanks for your help.