Which gaming headsets are worth buying?

Next time you need to yell at your guild members, try one of these.

We may call them "video games," but audio plays a big part in the experience too. Good music and sound effects can set the mood, immerse us in the story and alert us to impending danger. But all of this could easily be hampered by crappy speakers or a surfeit of background noise, making a quality headset key to an ideal gaming experience. Do you need surround sound, or can stereo do the job just fine? And how much is good audio quality worth? We've scoured the market to find the best headsets available now to fit the needs of both hard-core and casual gamers.