the steelseries headsets are very nice, i myself had been in the market to purchase a new headset, and coming from the creative fatality i was up for anything.
i ended up getting the corsair vengeance 1500, which is a USB heaset and i was kind of hesitant in getting it but being it was on sale from $99 at $69.99 it was a no brainer. I was upset that i would not be able to use my after market sound card for it but i installed the drivers, messed around with the 5.1 and 7.1 settings and wow, jumped in to the WarZ and i could hear where the zombies were coming from.
Great headset, comfy, very nice audio (not comparable to bose or other high end brands though), easy driver set up.
i also really liked the Mark 2 fatality headset by creative. I would try to get opinions from some sales reps if they game and use a headset, that is what got me to buy the 1500, the tech at the shop actually had bought two of them for both his systems, and debunked the issues others had wrote reviews about, and he was right, i cant think of a flaw with the headset