I used to use a motorola head set (HS850) been defective twice & stiil is,+ is not solid on the ear at all. Got a nokia BH200, much better sound, & hold much better on the ear without head band to strap it there (I repair equipment). & cheaper,$60. VS $120. After I tryed the nokia, I bought one for her so if mine fail I can borrow her. Now for the PC side of it, The adapter need to be one who can carry the voice so it has to be Advanced Audio Distribution Profile (A2DP) compatible. The one I bought is this one a BLUETAKE: http://cgi.ebay.com/NEW-BLUETAKE-BT007EX-USB-1-1-Bluetooth-EDR-USB-Adapter_W0QQitemZ220002607654QQihZ012QQcategoryZ3709QQtcZphotoQQcmdZViewItem
MORE HERE:http://www.bluetake.com/ I test it & work great, & you can use that one for printer(next) , stereo headset, I use a rikaline 6033 bluetooth GPS antenna(very quick to initialize & very accurated(http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&ssPageName=ADME:B:EOIBSAA:US:11&Item=9701718444
)) You can not use the same headset for more then one function at the same time (EX: phone & pc togeter) .
Hope this help a bit. wrench