Here are two good earbud threads:
I would recommend Yuin PK3 or PK2. Both are very comfortable and you hardly notice them in your ears. PK3 is sold from around $30 and PK2 from around $55. I prefer the PK2 as it is slightly more neutral sounding than the PK3, but both are good. None of them have microphone or volume control in the cord (if you are looking for that).
Newer Sennheiser earbuds also have a good reputation. You can get the MX580 from around $25. Then there's the MX880 that costs from around $60. The Sennheiser earbuds are bigger than the Yuin ones so they might not be as comfortable for those with smaller ears.
This is great information, thanks for the suggestions. My preference would have been for at least an in-cord play/pause button if possible, since winters here in Chicago make working with the phone itself pretty cumbersome. Unfortunately, I know options that include such a thing are limited. Any suggestions on that front? I'm wondering how much I'll have to give up to get that feature.
I've heard other comments praising the Yuins, so I'll look into them.