I saw Episode III this morning

[Nikia]

In the beginning part of the movie, I said to my husband "It is too bad that we know how this all turns out." I was anticipating him turning to the dark side. I was anticipating the fall of the Republic.
Despite this, I was bawling when he turned into Darth Vader and went on his killing spree. It was still emotional to me.
I wonder though how it would be though if I hadn't known. In the future, people may watch the first 3 before seeing the next 3 or knowing what will happen. It certainly would be different, wouldn't it?
Would you have preferred to see the first 3 before the last 3? Do you think that it would have made the third movie more dramatic, feeling, and powerful?