Plattsburg NY and Burlington VT from Montreal
I just checked a map and I can picture your situation better now, Ianic. This is a tricky location since the local Montreal stations could easily cook your ATSC tuner if your antenna gain is too high. I'm glad you recognized this danger and were wise to check into solutions here.
Since your goal is the U.S. stations, go for the antennas that will be best suited to that. A Wade-Delhi 306 will do great for VHF, and for UHF I would suggest a Winegard 9032 Corner Reflector Yagi for its superior rejection of side and back signals. As an option you could use a combo antenna like a Wade-Delhi 936SR instead and keep things simplified. Clearly you will not require a rotor if the stations are all along the same line.
Having recommended those antennas, you will need some complex filtering to radically lower the gain on all Montreal signals while keeping the U.S. signals high before the downlead goes to your ATSC tuner. This can be done with special notch traps and attenuators from such companies as Tin Lee:
http://www.tinlee.com
The goal would be to have a low bypass (not a complete bypass!) notch trap for every Montreal channel (with an added attenuator on that line if needed) before the downlead goes into your ATSC tuner. Each trap has a signal strength cost, so that amount of filtering and attenuating is quite complex given the number of OTA stations so close to you. I would highly suggest getting a professional to assess your situation. If you are up to doing it yourself we can make further suggestions.
Any different solutions to this problem, folks?