We use a Stihl Blower/Vac combi with gasoline engine, before we have had an electric Flymo/Elux.
At first, I would not buy this electric Vac/blower again, to unhandy and not very efficient.
The same for the Stihl. Only used as a blower it is total ok, but as a Vac it will become very heavy, and to empty the bag is a pain. I canエt believ that this combinations can suck wet leafs out of a gutter.
For cleaning the gutter, I would go wit Kenny.