Tvfool is the Correct place to receive the Correct Information.
Install Only 1 Antenna.
Your choice , ANT751 or Winegard HD7694P antenna aimed , South.
I favor the ANT751 antenna.
And Yes the HD7694P will work also.
Here is how to aim antennas ,
http://www.kyes.com/antenna/pointing.html.
Use a Real and Actual magnetic compass to aim antenna.
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A antenna system amplifier will most likely not be required.
If at some point in the future your evaluation is a amplifier might help with some weaker signals.
You can Test reception with a Winegard , LNA-100 'Boost' amplifier , installed/connected Before any splitter.
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Install the ANT751 antenna Above The Roof in such a manner that the roof and house are not impeding and blocking reception to the , South and North.
Instal the ANT751 UP HIGH in the air is the best practice.
As always , trees and tree leaves , plants and plant leaves , have a Negative effect on broadcast Tv reception and so do buildings and other obstructions including your own roof and house.
The Best Pratice is to install the ANT751 at a location that has the least amount to no amount of obstructions of any type or kind in the directions of reception including your own roof and house.
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Here are some places to buy antennas and etc. .
http://www.solidsignal.com.
http://www.amazon.com.
http://www.winegarddirect.com.
Home Depot and Lowes will sometimes have the ANT751 in stock in the the store , no mater what the Home Depot and Lowes web sites say.