I recommend a Winegard HD7000R antenna with a Antennas Direct PA-18 preamp aimed at about 186 degree magnetic compass. Here is how to aim antennas ,
http://www.kyes.com/antenna/pointing/pointing.html. The 2 groups of tv stations are 117 degrees apart , thats a real wide streach for a directional antenna to receive. The HD7000R antenna is aimed at KMCA channel 10
http://www.americaone.com that is a weak channel in between the 2 groups of stations. Here are places to buy antennas and etc. ,
http://www.solidsignal.com ,
http://www.amazon.com ,
http://www.starkelectronic.com ,
http://www.3starinc.com ,
http://www.winegarddirect.com ,
http://www.antennasdirect.com