How is shipping from California to Ohio much different than shipping from California to Ontario? Maybe it'll take another day or two to get there but other than that a US manufacturer should be able to support their Canadian dealers just as well as their US dealers and I don't see a languague barrier (we've seen Strange Brew, we know how to speak Canadian). If someone said you shouldn't buy Arctic or Beachcomber in the States for the same reason I'd scratch my head at that too. Of course the strength of your dealer is key in all situations.
I think all Hotsprings parts and equipment are proprietary which means the big component manufactures make parts especially for the spa manufacture and wont sell to anybody outside the dealer network. This is a problem if there is not a local dealer around to help you in a winter emergency because you local spa repair man cant get parts at a good price.
Correct me if im wrong