Canadian service is considerably more expensive that US service. Your choices are limited: Bell (CDMA) or Rogers (GSM).
Depending on where you travel, such as in northern Ontario (the 807 area code), you may find that Rogers does not have coverage. For example, we were in Sioux Lookout, which is 90 km north of Dryden. The only cell service there is T-Bay Tel (who just happens to own all of the 807 area code), and it is CDMA only up there.
1987 Excella 32-foot
1999 Dodge Ram 2500HD Diesel