Half of your receivable channels the ones in the shaded red part of the list are very weak. I make my recommendation of Tv antenna , on signal strengths and what Will get the job done. . I recommend a Channel Master CM 3414 - four way distribution amplifier , Fry's electronics stock number 5770182. The Baseline store is showing one in stock. On the one output port of the four way distribution amplifier that is not being used , put a 75 ohm terminator on that port , here is a example of 75 ohm terminators ,
http://www.amazon.com/Ohm-Terminator.../dp/B0016A986K , you will find 75 ohm terminators in Fry's. No splitters in the coax lines that go to the Tv's from the outputs of the distribution amplifier , each time a split takes place the signal is reduced.