For me, the ideal SII is the Donner cut without the time reversal and with the amnesia kiss in. That way I can enjoy it for what it is and still watch SR afterwards, knowing that it continues SII's story. Which is ideal, as it allows me to believe that these entries still count.

On the other hand, that is a good question: Should it follow Donner Cut's "previously on STM" thing, with the bad guys being released by Luthor's missile, or should the Eiffel Tower scene be restored alltogether? I'm curious...