Do you definitely want a headset, or would a lav work for you? My company puts on presentations and we use a couple of digital Line 6 XD-V70 lav systems. Sweetwater recommended these over some analog Shure systems we were thinking about purchasing. They were $500 for the lav mic, body pack transmitter, and receiver. XLR or 1/4" cable to plug the receiver into the mixer not included. I think they just discontinued this series in favor of a newer (XD-V75?), but you can still get the V70s on Amazon Marketplace. We just bought another one with a wireless handheld mic last week. These systems also can be purchased with the headset, but I think they were $50 or so more.