I bought various cars in the US, all the cars in the last 6 years.
Acura MDX
Volvo XC90
Subaru impreza
BMW X3
Mazda 6
BMW 328iC
Audi A8
Travel trailer
and all of them were savings of $5000 to $20000. the high end cars have way more savings then the regular ones. some of them are more challenging to import, some are less. overall, I would not buy a car in Canada for a while. it just does not make sense. and I believe it supporting local economy to a degree where it makes sense. once you do it once, its easy enough to repeat. and the savings are after tax dollars.
once I had a bad experience, flew to Chicago, the car had badly worn transmission (black tranny fluid), they refused to change it, I flew home. cost me $1200. but they stuck to the promise to give me my money back if I dont like the vehicle.