Stereo Bluetooth Headset and Video Games?

Hello,

I have a Bluetooth Enabled phone and a Bluetooth dongle for my PC.

I would like to get a Stereo Bluetooth headset so I can listen to
music on my phone and use it on my PC as a headset for playing online
video games (to chat).

Is there such a headset? Or do I have to buy separate ones?

Also - will all BT headsets work with a Nokia 6620 or are some
proprietary?

Thanks,

Tmuld