I already wrote something in the US study forum about UVA and it sounds nice, but I don't know anyone who goes there.
4 really good friends of mine go to UBC for different subjects (child developmental psychology, erm...medicine?, another science, and engineering) and all of them love it, even though they hang out in different circles doing different things.
If you have any specific questions, I can probably ask them.
That said, Canada might not be the place to go if you're longing for Melbourne weather. While the temperatures in Vancouver are more moderate than that in most of Canada (it rarely snows, for example) and it is really pretty in Southern BC, it rains allll the time and it's definitely not going to be as warm as Australia.
I can't speak for the other unis though.