Dingy on davits
I think the davits idea is overkill even for coastal cruising, I guess I dont see what significant problem it cures as my RIB tows fine. Neither seems a good solution for offshore, go with a soft bottom and stowe on the bow or collapse it.
Another issue with stern davits is that unless you have a big boat (60'' plus?) you may find the dingy weight squats your stern below the waterline and you''ll soon be gragging a foot of grass behind you.