The Canada tv stations/channels are easy. Install a ChannelMaster CM3016 above the roof. Aim the antenna at about 8 degree magnetic compass. Here is how to aim antennas ,
http://www.kyes.com/antenna/pointing/pointing.html. No amplifier will be needed with the CM3016 antenna. Use a simple common 2 way splitter to connect the two tv's to the antenna.
http://www.saveandreplay.com. Here are some roof top antenna mounts ,
http://www.ronard.com/909911.html ,
http://www.ronard.com/34424560.html ,
http://www.ronard.com/ychim.html ,
http://www.ronard.com