Check out www.ecost.com too. They will convert to CAD and calculate all shipping, duties, and GST on your order. I saved over a hundred dollars several years ago with them.
I've actually been thinking of getting one of these and just did a quick cost comparison for the 790SW. ecost.com is ~$312 including GST and shipping. Futureshop is ~$350 (329.99w/o tax right now). So you'd save a little bit I guess. The W30 is ~365 at ecost.com, and ~318 (299.99w/o tax) at futureshop. Wow, futureshop is actually cheaper. That kind of surprises me.