LG VX-8300

Hi All -- I recently re-upped my plan with Verizon and got the new LG VX8300. The phone has executed flawlessly, with exception to the Bluetooth. I've tried three headsets with the phone (Motorola H700 and H500, as well as a Plantronics 640) and all have had subpar performance. Typically, I can hear fine, but the person on the other end hears an echo or my voice is faint. Once I get about 10-plus feet from my handset, the reception really drops on both ends.

What should I do?