No experience with wireless headphones/headsets myself, but I remember reading that it only gets "good" with some models that are upwards of $200. Sounds like you aren't so much worried about the fidelity as the convenience of not having to deal with wires, though. I'd say check out those...
Exactly. The Corsair is the quickest and easiest fix. I agree with everyone saying to get a dedicated soundcard, headphones, and a mic. That's my setup plus an amp. The Zalman mic is super crisp and clear, though no noise cancelling so it'll pick up every noise in your room (in my experience).
I have a buddy who likes the Corsair headset you mention. Is sound quality important? If not, you can probably pick just about any of the gaming headsets in your price range and they'll be about the same.
Loving it so far, but have a couple quibbles (one of which is pretty big).
* Very console-ish. Think someone else already said this. It just feels like I'm playing a console game on my PC. Guess this is where gaming is headed anyway. This isn't too bad, really, but I feel like I should...
I'd have to suggest the Zalman clip-on as well. I have a Koss SB40 of my own, but the Zalman mic I clip on to my BD 770s sounds far, far better. Hell, it's only $10. As long as you already have a decent set of headphones go this route.
I actually like the Koss SB40 for an integrated solution. Prefer my K701s or DT770s if I don't need to use the mic, but the Koss definitely works well as a gaming headphone on the cheap ($30-40).