If you are an hour north of Toronto, the problem might be if you have to look past any of the Barrie towers to see Buffalo. If you do, they may overload a high gain amplifier if filters are not used on the input to reduce the high powered signals. Your TVFool report should help somewhat in predicting this. I am east of Toronto and use a CM-7777. The amplifier works great for me. I like the separate VHF and UHF inputs as I have separate antennas. TVFool can also help to determine if going higher will help out. Height can play a big factor, even if there are no obstruction in the immediate area. As with Teehar's experiance, I had no reception without the pre-amp.