I recommend a Antennacraft U4000 antenna with a Winegard HDP269 preamp aimed at about 115 degree magnetic compass. WXII NBC and WUNL PBS are strong and will be easly received through the back side of the antenna. The Tv stations to the east and south east will be received. The antenna Will Need to be mounted above the high point of the roof line. Here is how to aim antennas ,
http://kyes.com/antenna/pointing/pointing.html . Also read and understand about , REAL Digital Broadcast Tv Channels , Virtual Broadcast Digital Tv Channels , Analog Broadcast Tv Channels ,
http://forum.tvfool.com/showthread.php?t=695 . Also I strongly recommend replace all outside coax with new coax , RG-6U coax. I also recommend replacing all outside splitters and other hardware that has been exposed to the weather. And I recommend replace inside coax that might be defective. The name of the game is get the signal to the Tv.