My husband already has a pair of Shure in-ear headphones that are a slightly different model (they're a couple of years old now), so when I got my own iPod I decided that I wanted my own set of headphones as well. The sound quality is much better than the ones that come with the iPod, and even though I'm not an audiophile I can definitely tell the difference. The headphones fit very comfortably in my ears, too.
My husband's headphones came with extra cushions and filters, and these don't, but so far he has only replaced the filters once and I like the standard black cushions, so that's not a problem for me.