Don't buy a headset. I've been there, done that, and learned my lesson. Just get a nice pair of headphones and a separate clip on mic (Zalman has a great one). I've used that Corsair headset, Turtle Beach X3's, and Astro A40's, and none of them come close to my Audio Technica ATH-M50/Zalman mic combo. Way cheaper this way, plus I've got a nice pair of all-purpose headphones instead of something I could only use for gaming.
Those Corsairs aren't even true surround by the way. False advertising. Plus they have no bass whatsoever. Complete junk.