You'll get a lot less wind load, and take up far less mast space if you choose yagi-style antennas instead of panel-type antennas: consider this choice, instead; an AntennasDirect 91XG aimed at 158 degrees, and an Stellar Labs 30-2065 aimed at 220 degrees.
You don't need amplification for the Toronto stations, but you do for the Buffalo stations. Probably the easiest way to accomplish this is to use a high-input preamplifier on the XG-91, such as an AntennasDirect "Juice", and run separate coax leads into the house. Put the preamp power inserter on the line coming from the XG-91, and combine the signals from the two antennas using a combiner-splitter AFTER the power inserter. You can then distribute the signal throughout the house, and can add a distribution amplifier, if necessary.
The rationale for using a preamplifier here is to more closely equalize the signal strength differential between Buffalo stations and the closer Toronto stations before combining the signals.
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