After some search I think I will buy one of these two. The good thing about the sennheser is that is really portable as it's foldable. How is the audio technica in this respect?
The Audio Technica's probably get my vote on sound but it is a personal thing - and a close call with these headphones. In answer to the portability question though I tried taking a pair of ES55 on a train without much of a problem.
lol. that was exactly my question. I want the best but with portability and I know the sennheiser pretty well but the audiotechnica I can~t try and on the web I don't understand how portable they are...