UPDATED - Please help me choose black tie optional dress for a wedding

So we have a wedding in a few weeks that's at a resort in Virginia. The invites say 'black tie optional' and I'm clueless... So I had DH take pictures of me in every dress I own tonight and could really use your help, ladies!

I'm going to the outlet mall tomorrow and if none of these cut it, I'll buy a new dress. DH says I don't buy the right dresses for my body. If I knew how to do that, I would!!!! ::sigh::

Any help would be greatly appreciated! Thanks!!!


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So I got a dress today... I'm going to try to get DH to take a photo of me in it, but here's the dressing room shot...

What do you think?