I would recommend running your larger bags in front and down low. If you plan on getting a smaller set, try them out in the rear, with the heavy compact items down low in the front. As long as you aren’t touring in a situation where pedal clearance is a potential hazard(singletrack, etc) then low rider front racks shouldn’t be an issue. If you run your current set in front, you could then fit the Arkel Dry Light panniers. They aren’t breathable, though, so might not be the right option for you. But at $100, 100% waterproof, rugged, and weighing just over a pound for the pair, they’re a great option for your sleeping bag and things like that that you want to make sure stays dry.