Hands down I love the image 2840 / the Maggie dress the best! You look stunning in it!
The other dress is a lovely option too, but the Maggie dress is a "wow." I like how you said it makes you feel like you are going to the Oscars... hehe. I'll prolly end up with a big ballgown for my beach wedding, BUT my philosophy is it's your wedding you are entitled to feel like (and look like) a superstar!
Let us know which one you pick! You'll be a star either way!