Microphone Recommendation

I'd like to use "Buddy" in a group setting and would like a recommendation for the m ost suitable microphone that would:

1. The microphone must be able to produce a clear signal of a person speaking at normal volumes from 10 feet away from the microphone.
2. The microphone must be small enough to fit in a laptop carrying case.
3. The microphone must be able to feed directly into a laptop.