Do you just not like having these earphones inside your ear or are you looking for other similar in-ear earphones? I know some people don't like the feeling of having these things inside their ears. I've seen some headphones that are designed for portability, so they can be folded and should be able to fit inside your pocket. But most of these are only available in Asia.
I started out using a pair of Ety ER-4S with a portable amp with my Cowon iAudio X5. That turned out to be a pain in the rear trying to juggle with all the pieces at the airports. I ended up ditching the amp and connect the Etys straight to the unit. But that sounded bright, and bass shy. I've since replaced the Etys with a pair of Shure SE530. They work fairly well, and sound fairly good without using a separate amp.
FrankC
I started out using a pair of Ety ER-4S with a portable amp with my Cowon iAudio X5. That turned out to be a pain in the rear trying to juggle with all the pieces at the airports. I ended up ditching the amp and connect the Etys straight to the unit. But that sounded bright, and bass shy. I've since replaced the Etys with a pair of Shure SE530. They work fairly well, and sound fairly good without using a separate amp.
FrankC