I exchanged the ones above for these:
Turtle Beach P4C. Again, it's strictly for chat, but my first impressions of it are fairly positive. I can sometimes hear my own voice echo, but aside from that it isn't bad for 29.99. It's reasonably comfortable, I can hear people just fine when I turn the volume all the way up, I can wear it on either ear, and it's less sensitive to outside noises than the default earbud microphone, but it does still pick up some things, from what I'm told. If you're not looking for fancy surround sound and are on a budget then these are decent.