I am truly impressed by the Plantronics Voyager 510 Bluetooth Headset.  It quickly sinc'ed up with my Motorola cell phone and the ease of use is very appealing.  The price is not so shabby either; this item was $99.00 but Amazon had it on sale for less than $45.00. It also works well with voice recognition on my cell so it is hands free while I'm driving.