I assume you ARE in the service area - as VTR does not offer mobility services beyond Ottawa West.
If you are, then:
a. you might not do much better than the 62$/mth you pay now
b. if you switch, you will see no signal or network quality difference. As @Anonyme mentioned, if you're not in a VTR tower area, you'll be roaming on Rogers (and that does NOT count against your 50% roaming time limit, as it does if you roam on Bellus). Now, if you spend your life in Toronto...that's a different story 🙂
I'm in Ottawa West and for the last 2 years the service has been perfect, roaming included.
PS. I beg to diiffer on the customer service experience, I had my (small, account related mostly) issues solved every time. I actually appreciated the more polite approach and conversation. But I know...all it takes is a bad experience and the good ones are forgotten.