I personally would never elevate a Superman actor to the top ranks whom I didn't like as both (as is the case with Reeves, Reeve, Hoechlin, and Routh) -- particularly since I don't perceive them as separate characters in my mind. Cain is indeed an appealing Clark, but an unconvincing Superman. Cavill is nowhere in the running as either.Eh, I'd go with Dean Cain for Clark and Cavil for Supes.
Actually I think now would be a perfect time to maybe finally explore the character. Connect it even to het dad now retiring though I guess that might be something of a cliche so I wonder how they could make it so it doesn't feel like melodrama.