[Harmony♥]

I think the third idea is cute, and doesn't seem too much like an anniversary gift. You could put the candy INSIDE the box, that way when she opens it, she has a surprise inside, and the roses you can just hand to her, since putting them in the box would obviously crush them. I would use all 3. A girl likes something special, and well thought through, and it seems like you did a wonderful job thinking these 3 things through.