JohnChu,
In order to get the 6ave.com deal on the 3803 (and the deal is still going as far as I know) you have to look at the 3802 on 6ave which they claim they have in stock (but they do not have in stock!

and what happens is they immediately substitute the 3803 for the 3802.
I acknowledge this is a fantastic deal and 6ave are authorised Denon retailers but theyy do not ship to Canada. Secondly, I do not know what will happen if you have a warranty issue. Will Denon Canada honour it? I think perhaps not.
Otherwise, purchasing (the 2803) from *authorised* Denon retailers in the US and shipping to Canada is generally not that much of a savings compared to buying from a store in Canada where you are able to negotiate the price.
However, for some reason there is in Canada a quite hefty mark-up on the 3803 as opposed to the 2803. Roughly the closest I can get them to is C$600 whereas in the US the price difference is generally a bit under C$300 (US$200).