I can't believe no one have mentioned the Shure's 215 SE IEM's.
- Detachable Cord
- Thick and durable cord(reinforced with kevlar).. The whole IEM is really sturdy unlike the Klipsch s4i which are known for breaking easily in less than a year.
- REALLY comfortable, in fact I always forget when wearing them. As a matter of fact, as you said that you travel quite a lot, these provides excellent sound isolation.
- Now, most important..SOUND QUALITY. I pretty much agree with what Head-fi reviews says about this excellent IEM's, in summary: balanced sound, smooth bass and great clarity. Check some reviews in Head-fi about this IEM's.
Finally, all this for 100$(you can get it for less). A better deal? Im sure not.