Ask about metal when you want a surface that sheds rain in sheets and gives moss less to hold. Expect the real discussion to be flashings, fasteners or clips, and what the snow will do at the eave. In Duncan itself the printed snow load is light. Toward Shawnigan Lake and the west side of the lake it is not. Panels do not erase that difference. They sit on a structure that still has to match the row for the address.
If the roof is leaking this week, metal is probably the wrong first call. Repair the opening. Talk about a new surface when the old one is actually finished.