While I know that the Donner Cut will never be a complete movie I prefer it over Lester's version. I really loved how the Donner cut included all the extended Jor-El scenes and cut out nearly all of Lester's camp.
But the ending for the Donner cut felt REALLY sloppy. I agree with chrisspringob
that they should have had Lois still remember everything and ended it with the scene of Superman over Earth. There would have been nothing wrong with Lois knowing the secret at the end of the second movie. That's what we call character development. Who the heck cares about Superman IV anyway?