I had a very up-and-down shopping experience at Ann Taylor this weekend. I was so excited while entering the store - the fabrics! The colors! The patterns! I mean, these dresses? Totally made my stomach flip:

http://www.anntaylor.com/ann/p.....Color=5842
http://www.anntaylor.com/ann/p.....Color=6600
http://www.anntaylor.com/ann/p.....Color=6600

And yet after about 45 minutes of trying on armfuls of clothing that had made my heart pitter-patter, I walked away totally empty handed. The fit of all of the garments was just... off. Too tight in the bust or hips and baggy elsewhere, clingy around the midsection, or the waist on the garment did not hit anywhere near my actual waist. Maybe it's that I no longer have an ideal AT physique. So disappointing.

So... with the above dresses as a starting point for what I'm currently lusting after, I'm looking for suggestions for dresses to try for a wedding I'm attending at the end of the month.
In terms of formality, it's an evening wedding in Seattle at a yacht club, but I don't think it's all-out formal either - the bridesmaids are wearing cocktail length dresses and the bride is wearing (hopefully dressy) flip flops with her gown. I don't have anything currently that feels or fits right, so I'm on the prowl for something new.
And it's in Seattle, so while the end of July may be blazing hot in your neck of the woods, our unpredictable and cold weather has made me wonder if it might still be chilly and raining by then.

Oh, and I am very much Team Store, but I'm willing to purchase online if need be from stores that have a generous return policy and quick shipping times.
Help?