I suggest a Winegard HD7084P all channel Tv antenna connected to the distribution amplifier , no preamp at the antenna. Pointed at 163 magnetic compass , Here is how to point Tv antennas ,
http://www.antenna/pointing/pointing.html . . . Read and understand this about , Real Digital Tv Channels , Virtual Digital Tv Channels , Analog Tv Channels.
http://forum.tvfool.com/showthread.php?t=695 The advantage of using a large antenna is large antennas gather more signal and are more directional , the more directional the antenna the better the antenna rejects interference to digital tv channels.