I purchased my 1Ds MKIII at Downtown Camera in Toronto. Neither Vistek nor Henrys had it in stock, but DC had one on the shelf. I got CPS (Canon Professional Services) pricing on it which saved me about $500. None of the US stores I approached offered CPS pricing (including B&H). The final price (before tax) was CDN$7500.
So in the end, because of the parity between the currencies it was actually cheaper for me to buy in Canada than in the US. You could even save on taxes if you live in a province without Vistek - they will ship it to you sans tax, and if you have CPS you get that thrown in as well. The caveat being that you have to pay the whole amount up front while you wait for them to get stock in.
Andrew.