External mic for MP3 recorder/player

I do a lot of small meeting-type recording using small MP3players. The built-in mics are OK, but I need something better particularly when recording in bigger rooms. What's a good, moderately priced <$80 omni-directional mic?
Also recommend a good lapel mic to buy. I've reviewed passed Forum posts but couldn't come up with anything but uber $$$$ items.

I know you get what you pay for ... but it's difficult to select one w/o trying it.

Any suggestions would be helpful.