Don't know if they ship to Canada or not, but B&H is VERY reputable and have (for the most part) very good pricing on things with no hassles. Lots of the other camera stores play games to get you to buy accessories and then cancel the sale of you don't buy any from them.
B&H Photo Video | Digital Cameras, Camcorders
Here's a decent listing of many on-line camera shops and how reputable they may or may not be:
Camera Shops - photo.net
or you can enter the name of a shop in here:
Discount Shopping and Store Reviews by Real People at ResellerRatings
and see how they've been rated by other customers.