Gameplayer has tested out the latest Logitech gaming headset and they have a detailed review up. They go as far to declare that it will improve your frag count.
"The left earpiece is the part of the headset you'll be interacting with most as it holds the fold-down microphone, as well as the G35's buttons. The microphone is easy to move, flexible and can be bent to move it closer or further away from your mouth. The microphone also does a great job of filtering out external noise and has a clear voice level set up by default."