WMUR 9 ABC is to the north east , so no need to receive with the DB4e. WCVB 20 is to the south east will be received buy the DB4e. Aim the DB4e at about 145 degree magnetic compass. Here is how to aim antennas ,
http://www.kyes.com/antenna/pointing/pointing.html. All of the receivable digital Tv stations/channels to the south - south east are UHF channels , so the DB4e ,
http://www.antennasdirect.com , will do a real fine job. As far quad coax goes . "quad" "quad coax" "quad shield" have become buzz words , it sounds cool and impressive to say. Yes quad shield does have uses as an example, at high interference locations and situations. Satellite system dealers/installers are using more quad shield because of the ever increasing amounts of wireless devices that use the frequencies that are used to transfer signals on the coax from the dish to the receiver.