So, which in-ear headphones would you pick?

I've been suggested sennheiser CX 400, but still its a bit pricy, then i've seen a review of the TDK ep-200 which is roughly $15, but that just sounds too cheap that they really can't be any good?

Any good suggestions of whats worth checking out?
Guess the most important is comfortability and next to that decent sound. But since i will have to wear them for many hours, comfort is important. Also pricetag is worth a mention :D