Yup Deluge are great but you want to be wearing them. They aren't particularly light or packable, less of a problem on a day hike but not great if you're backpacking and that space is at a premium. I like how they're fairly robust, fairly comfortable waist band and cheap if you somehow destroy them. They definitely have the 'suit of armour' feel when you're wearing full waterproofs in the middle of a storm!
Rab Downpour are a good price for a much lighter product since it's made of Pertex Shield which is far more packable so I'd put them forward if you want to carry them for most of the day as some cover, or intend to backpack with them.