The television transmissions are Very Strong at your location. And there are Many receivable channels. The DB8 is a UHF antenna and will receive VHF high band channels 7 thru 13 to a lesser degree. Removal of the metal reflector screens will allow the , >< , shaped metal reception elements to receive more signal at the back side of the antenna. Aim the DB8 at about 266 degree magnetic compass. Here is how to aim antennas ,
http://www.kyes.com/antenna/pointing/pointing.html. I see no reason to replace the DB8 with another antenna.