I think Canada requires retailers to charge tax on all sales, no matter where it's going, so you might have to pay as much as 13% tax, totally negating your savings. Plus your credit card may charge you a foreign transaction fee of something like 3%. You're welcome to look into it, with the current exchange rate, as long as you don't have to pay some huge tax you might save some money.
When I add it to my cart on McBain Camera and indicate I'm shipping to the U.S., it doesn't add tax to the order.
The 5DII + 24-105mm kit got even cheaper on Amazon! Now it's only $3019.