DSNY FN, thats a tough situation.
you are basically 120 miles away from all 3 main American HD sources, Detroit, Cleveland, and Buffalo. And just over 100miles from TO.
your best chance is definitely Hamilton, which has one HD channel right now, with CH-HD on the way. Erie is also closer to you, but right now they only have SD channels.
in order for you to get the American HD channels, you are going to need a monster tower, with a high performance UHF antenna, a high performance preamp, and a rotor.
i think if you got your self a 60foot tower with a premamped CM4228 on a rotor, you'd be able to get Detroit, Cleveland, Buffalo, and possibly Toronto all at the same time with the turn of your rotor.
this would probably give you the most impressive reception on this forum, period.
whether you want to spend the money and time on this, and still not be guaranteed anything will come in, is up to you.