The Magnum can't be replaced yet, it's in a class of it's own.
Is the typical wagon to small for them?
Outback, Forester? Mazda's CX- suck on gas. Chevy is well... Audi has that Q thing I think is hideous?
Has he drove a Edge, my grandparents just bought one and they love it. Unlike the Flex it is not offered with the ecoboost (yet). IIRC, the engine choices are lacking.
What about a used Cayenne? I have no idea of them accept for I'd love to rock the fam in one.
Sit him in a C63amg- he can rent something ute wise if needed