I use the Plantronics Voyager 510 and it works great with the Droid. I haven't had any problems with connections nor reception.
I just bought the Plantronics Discovery 975 and it is friking awesome. Has Multi-point connection capability and I can connect bluetooth to my personal (Droid) and Work (BB Curve) at the same time. Answer whatever phone rings. Still does not work for BT dialing on the Droid, but overall I am loving it!!!
Original Jawbone. Works beautifully. One thing that struck me immediately is how quickly I am connected to an incoming call when I answer the phone. On my HTC Touch Pro there was a 2-3 second delay after answering before you were able to hear or speak to the caller.
I use a moto h680 bt headset it works great but I am looking at getting the motorola HX1 endeavor with true bone coduction tech if anyone has one of these I would love to hear a personal opinion. I've read almost all there is to read from moto concerning droid pros and cons motos response to the lack of voice dial via bluetooth is "motorola is aware of the blutooth voice dial issue with the droid and we are doing everything we can to correct the issue" so I don't know when but I believe it will be fixed soon
You are right to be wary. There is much bullcrap. Be wary of me too, because I may be wrong. Make up your own mind after you evaluate all the evidence and the logic. - Mark Rippetoe