You are living the easy life , the tv stations from the USA and Canada will be received. I agree with your antenna selections , A HD7698P antenna aimed at about 320 degree magnetic compass and a HD1080 aimed at about 164 degree magnetic compass. Here is how to aim antennas ,
http://www.kyes.com/antenna/pointing/pointing.html . Separate RG-6 coax will go from each antenna to the location of the tv and a remote control A/B antenna switch will switch the antennas , AB27RS remote control A/B antenna switch. Do not try and combine the two antennas on to one coax , the reception will not be good. Here are some antenna mounts ,
http://www.ronard.com/909911.html ,
http://www.ronard.com/34424560.html ,
http://www.ronard.com/ychim.html. Here are places to buy antennas and etc. ,
http://www.solidsignal.com ,
http://www.amazon.com ,
http://www.starkelectronic.com ,
http://www.3starinc.com ,
http://www.winegarddirect.com. Mount the antennas about 4 feet apart on the same mast.