Siberia V2, awesome sound, retractable microphone (nice for when you're not talking, and you just want headphones) the ONLY problem some people have, is that long duration of use (many hours) causes a bit of sweaty ear, BUT this hasn't happened to me much at all, plus with the extension cord, it's got PLENTY of length, and it's got volume control and mic mute on the cord about 12-18 inches from the headset.
i bought mine from eBay (china) so they were pretty cheap...