Help? What headset will work best with my Cisco VOIP phone?

I need a headset for work that will do the following – 1) Plug into a Cisco VOIP phone (the standard one you see everywhere) 2) Greatly amplify volume (so for example, if the call is very hard to hear even with phone’s volume blasting, headset would further amplify sound) 3) Has a mute button … Continued