In the past, I've used the Scala Rider teamset, and it worked great for what it was. It was also $300 at the time. I'm not sure what it runs nowadays, but I talked my father in law into ordering a knock-off version and he loves it! I just figured I'd share. The shipping was a bit slow, taking around 2 weeks... I've ordered from thei company before, they have a LOT of gizmos and gadgets that are straight from Hong Kong... Here's a link to the headset if anyone is interested!
http://www.dealextreme.com/details.dx/sku.35612