Well... Mercon V is a performance specification. All of the fluids you mentioned are certified by their manufacturer to meet or exceed that spec so you can use any of them with confidence that they will perform to the level required by Ford. If you still have doubts, though, I'd say go with the most expensive one.
I wouldn't bother with it only because it's 10 bucks a single quart which is overpriced but it's mercon v so it must work. you're better off getting Castrol transmax.