Buying a car that needs a warranty. Better to buy a reliable brand!
I bought a New Civic last year. They tried to push me for the extended warranty. I told him that I'm buying it because it shouldn't need the warranty. That's why they charge more for the Honda.
On the slight chance that you need the warranty, shouldn't the original paperwork be enough. It's not like you have to register the car with the manufacturer when you import. The government, that you register with doesn't care.
The problem is purchasing the new car from the dealer. The manufacturers are threatening the dealers if caught selling to Canadians for export. But it's no problem to buy a new car for use in America. This means registering in the US (cheaper where they don't charge sales tax Oregon, Montana, Delaware, etc) and exporting to Canada afterwards. Dealers I've been in contact with have told me they won't charge sales tax if I pay to have the car trucked to the border. Or having a friend/relative in the US putting it in thier name and then selling to you is also a viable tactic.
On the new vs used debate, the savings on a new car is HUGE, because of the recent appreciation of our buck. Because of this, the savings on a new car is so much more than a used one.
Check the difference on the Porsche Boxter if you want to see a price difference, or the BMW Z4 for that matter. If I can save $30,000+ on a car, it's worth jumping through a few hoops, don't you think?