You got a lot of great suggestions and you'll certainly get the bang for your bucks. The Canadian dollar is terrible for us right now. You can also go behind the fall on the Canadian side and end up at the base of the horseshoe falls it's quit a view. You'll have to check out Antica Pizzeria, walking distance from Fallsview, I love their pizzas. Bravo Pizzeria & Grill, is another good one but further walk. I would not recommend the Chinese restaurants there, if you have time take a drive to Toronto for that.

Have a good trip if you do come.