It's so smart that you ordered all three! Seeing them and trying them on can really change a dress in your eyes. I went bridal dress shopping with a friend and she tried on a ton of beautiful dresses and when her mom came in to the dressing room with this one dress, my friend said it was the ugliest thing she had ever seen. When she tried it on, though, it was absolutely beautiful.
Edited to say: Not that I think any of the dresses are ugly! That story totally didn't come out right.
As far as my opinion ...
I love number 2.
And congratulations!