I would also love to see the Saints trade up to get Berry...
History shows that the #1 pick will be a quarterback, but the recent trend of failures at that position would lead me in another direction if I were a GM. Look at what the Texans did when they drafted Mario Williams instead of Reggie Bush, Vince Young, etc. They got pummelled in the media, but looks like it turned out to be a great move on their part.
When you have a sure thing on defense or O-line, it sure would be hard to pass up. And Berry is as sure-thing as you can get.