Travel headphones need to be...


I'm in research for the best to my needs headphones which is narrowing my search to:
maximum comfort
portable and foldable
no earbuds or in-ear = minimum comfort = unacceptable
performance clarity natural
non-fatigue
ipod friendly(but not necessary plan to buy portable amp anyways)
budget $100 or bellow.
128x128marakanetz
Sennheiser PX-100, I love mine.

http://www.sennheiserusa.com/private_headphones_mid-size-portables_502816
Agree with Gb24's recommendation of the Sennheiser, you won't find anything more comfortable and the next step up in the line, the PX200, is still within your budget.

If you're going to be flying and are interested in active noise cancellation the PXC250 works very well at the price and has the same design as the 100 and 200, with the addition of a battery case inline in the cord. None of the three provide maximum isolation on their own so the noise cancellation is a nice addition.
Sennheiser HD 238, sound very good, very comfortable. Online can be found within your budget.