Same mind, here...
The little added things on Fellowship were much better! I don't regret having only the theater release of ROTK - it's better than niothing at all!
Although, I think it's a little much for a 7yo to see, yet. He can handle Fellowship and TTT, but not this one yet...
Well, it's not like you've missed your shot at the Extended RoTK yet... Certainly you aren't saying you won't buy it :~o