I like my Etymotic ER-6 a lot. Sound good, attenuate external noise, comfortable, easy to carry, won't break the bank. Bonus: with a rubber adapter ring, they also fit into my custom musicians' earplugs as a replacement for the Etymotic ER-9/15/25 filters. Nothing's more comfortable than custom-molded earplugs + my ER-6 earphones. But even stock, I like the ER-6. Note the ER-6 are different from the ER-6i, which are not compatible with custom molds. The ER-6 cost ~$75.