Well, 515 isn't that bad if that's the full total you paid. The end price from the 2 sources I listed above works out to $478-$485 so you didn't pay that much extra.

I am really wondering about the Buy.com Canada though, and if it's even legit that they are "getting stock". I tried contacting their customer support to ask the question of when they will receive stock, and I got a delivery failure on the email address! That doesn't look good.