Long Black Dresses

Apparently long black dresses are not as easy to find as the "little black dress." I've been searching for a long black dress to wear as a bridesmaid in Kiyomi's wedding. There's a lot of pressure since all 5 of us get to pick our own dress. I don't want to look too fancy, or stand out, and I don't want to show up in the same dress as someone else either. That would be weird.
The hunt has resulted in a lame three. Luckily 2/3 are in my price range. It's been difficult since the only websites that I can think to search for dresses are: Ann Taylor, Nordstrom, Macy's, JCrew, and BR. Which one would you choose to be a part of a bridal party where you all got to pick the style of your dress?
1) I love it from the front, the back...eh


2) Not really special, but it's on clearance and fits the occasion.
3)Pretty but much too expensive for one time use, just thought I'd show it off.

(it also comes in black.)
So here they are, the only long black dresses I could find on the 5 websites I know. Now to decide.