WELLLL, i have been down the mic road -- here are my learnings:
- headset mics are much more convenient than pedestal
- noise cancelling mics cost a few more $$
- noise cancelling mics have lower signal to noise ratio but tend to pick up less background noise
- el cheapo non-noise cancelling mics give you stronger voice in-game, but also overdrive very easily
- check the signal to noise ratio before you buy -- i buy the cheapies with over 60db -- 46db mics don't have enough umphhh.
-if you get the cheapie with higher db, just make sure to not speak directly into it -- as a previous post said, check your sound in sound recorder.