I'd tend to go with the school that suits you the best... almost every school out there is going to play the "High Time Instructor" card, the "In the Mountains" card, the "Best Machine" card, or the ever so famous "Best Bang For Your Buck" card, but if you don't get along with your instructor(s), for whatever reason, you're not going to get the best results.
PS, while I know several of the instructors at Canadian here in Penticton, and all of them are great guys with even better reputations as pilots, that's a heck of a lot of money to shell out for a commercial ticket.
Granted after you make the payments on the machine for the next ten years they'll likely set you up with a job after... $130+K for a $40K per year job (if that) isn't your best investment.
Most, but not all, of the companies I've spoken with regarding employment attribute their hiring to work ethic, teamwork ability, passion for the job, and salesmenship over endorsements or school choice.
Good Luck!
Cole