I LOVE this dress! The color is great, and the little bit of cleavage is perfect; so is the length and your waist looks so TINY (good choice of belt, by the way..)
I don't know why, but out of the three choices, I love this one the most. I think it's because I love bold colors against dark features (hair, skin, etc). I would add a layered chunky necklace (colorful or not) with mixed metals that just fills in the nec