For a pure touring binding, low-tech bindings are the best. But they require a dedicated boot with tech fittings.
Frame-style touring bindings are a good option, albeit a heavier one. They all have their upsides and their downsides, but they don't require a special boot. Although a boot with a good walk mode will make longer tours more comfortable.
People shit on Dukes because of the stack height, but it's not noticable to me. They're also heavy, but so are my 4frnt Turbos.