The thing you gus don't get about the american buck being under par tothe Canadian dollar is that the people providing the hardware pays in fact moe, because of it, so the prices tend to be higher than if you're buying form US to US. You could always buy from the provider itself, but you need a company.
Personally, if you want an Xbox 360 or TV, tigerdirect.com and .ca is the same thing. the .com site and .ca site have warehouses in both countries. If They need a product that is in order, the Us warehouse can sometimes help them out.