Need advice on good Lavaliere mic to use with MBP

[rich in distress]

Any lav mic with a 1/8" will work. I would not bother with a wireless.
The sound will be infinitely better because the mic will be close to the sound source.
Radio Shack's is 30 Ithink, and there's an AudioTechnica for 25 at amazon.
They all would be fine.
Good luck...