I've been using the Auzentech Forte for ~ a year now for competitive gaming, and it's been great.
It has an X-Fi chip built in, so you won't have driver nightmares like the Asus you mentioned.
You can get one for about $90 off of Auzentech's site. I'd suggest doing that, and spending more money into your headphones. If you want to go the budget route, the Audiotechnica ATH-AD700 are near-unbeatable for any cans under $200 in terms of soundstage IMO.
Those, plus the little Zalman clip-on mic would make for a much better gaming experience. Especially with the Auzentech Forte, which happens to have a headphone amp onboard.
Just my 2 cents.
