Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
I've never found an in-ear that I like. I can get them to fit in one ear but not the other, and the bass is extremely lacking on those that I have tried (Shure e2c, Sony EX71, and a few others I can't remember). The best portable phones that I have found are the Koss PortaPro units; they are extremely light and open. I just bought a pair of Sony MDR-V6 (not V600) closed headphones for thoe times when I need isolation.
 
As an Amazon Associate, MacRumors earns a commission from qualifying purchases made through links in this post.
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.