I bought some Koss headphones for $30+ at Walmart for working out, and although they came with 3 sets of different size inserts, none fit well and the sound lacked any bass. They also fell out when moving or sweaty at all. These Nike headphones sound great, and the over-ear clips are very well designed. The rubber pouch is a neat design too, keeping the cord tangle-free.
edit: I got these for under $20 on Amazon. I was going to get another pair since I gave mine to my GF, but now they are $47???