Actually, I was thinking of shipping the rims to Buffalo to a depot that I regularly use for tires. It's a lot cheaper for us to buy in the US and ship for pick-up.
@Blu Angel - not sure if you were thinking of the same, the savings are quite substantial. I priced out 19" Michelin 4S Sport tires and they are about $1000US vs. $1600 Canadian + tax. You can save an easy $500 crossing over the border...