Welcome to the HD and digital TV world and congratulations on your new Sony.
One of my friends is looking at that model Sony. I am amazed you are doing so well with the Terk antenna. My experience with Terk antennas is not so good.
For an antenna , something with good gain, and no preamp as it would be overloaded by the local stations near you. Unfortunately the direction to the Florence / Myrtle Beach stations is different than the direction to the Wilmington...