The Tv transmissions are strong signal strength , I recommend above the roof install a ANT751 aimed at about 128 degree magnetic compass direction.
Here is how to aim antennas ,
http://www.kyes.com/antenna/pointing/pointing.html.
The 128 degree aim direction is a in between aim direction for reception of the Canada and USA Digital Tv stations/channels.
I think WCFE at 197 degree magnetic compass direction and the group of Tv stations at 83 degree magnetic compass direction and the Digital Tv stations in between will be received in the Current Plus Pending Applications Digital Tv stations channel list in the Green and Yellow reception zones.
For 1 Tv connected use no splitter. No preamplifier.
For 2 Tv's connected use a common simple 2 way splitter. No preamplifier.
Some common Tv antenna mounts are , tripod antenna mount , eave antenna mount , chimney antenna mount.
Here are some places to buy antenna and etc.,
http://www.saveandreplay.com ,
http://www.trentondistributors.com ,
http://www.amazon.ca ,
http://www.solidsignal.com ,
http://www.amazon.com