Wireless Microphone Mostly for Skype/Vent

I'm purchasing the Razer Orca headphones (without a microphone) because I have heard SO many bad things about the Razer Carcharias headset (with a microphone), which was my original choice. Everyone complains that the Carcharias headset allows sound to leak from your headphone speakers to the microphone, which means everyone in the call can hear all of the sound from whatever application you are using. Since the Orca does not have a mic, I've started looking for a good wireless microphone that I can just clip onto my shirt or something. Can anyone offer any feedback on the Razer Carcharias or suggest a good wireless microphone to use?

What I use is a desktop microphone, since my headsets mic is horrible. I don't know about any wireless microphones, but what I'm using is the Logitech usb desktop microphone. It's pretty nice, and you can't beat its price. Not wireless, but again, I don't know of any good ones.

http://www.amazon.com/dp/B002VUAFY8