Hey Lamopar - What year is your truck? Does it already have a puck system in the bed? If so, this really makes it easier for you.
I love our B&W RVK3600 hitch. It's very easy to lock and unlock. You can visually see the jaws shut around your pin to verify that it's closed.
Our 5er is heavy, but the air pin and the hitch give us a super smooth ride.
I would avoid or at least heavily research any kind of goose neck adapter. Many toy hauler builders specifically preclude goose necks in their warranties. Find out if your builder is one that advises against them.