I'm using the SteelSeries 7h. Simply love the sound of it, both input and output. Tailored for gaming, so the sound is a bit "deeper" and static, so if you listen to a lot of music, it might not be the way to go, not that the sound when playing music is bad though, it's just not "dynamic" since you want the static sounds for gaming (mostly FPS'). But I've actually started to prefer listening to music with it.
But besides that, I certainly haven't had any complaints about the quality of the microphone. The voice is clear, and it pretty much ignores everything it's not meant to pickup. Can only recommend it.
http://steelseries.com/products/audio/steelseries-7h