Searching & Shopping: I Need Your Help!

I am searching for THE black maxidress. 

One that is long enough to hit the floor and not shrink after washing (even on cold and line drying). One that is opaque. One that fits a 5' 8", size 12 lady. One that doesn't require an elaborate undergarment to wear (I would prefer wearing a regular bra over strapless). One that is affordable. 

Really, I'm desperate. I've checked Old Navy, Gap, American Eagle, J.Crew, etc., and nothing. The closest I got to was one from Alloy, which has the potential to be embarrassingly see through.

Here are some of my online finds:

I am loving this blue striped version as well as the black!

Maci Maxi Dress, $19.90-23.90 from Alloy

(This is available in XS-XXL and in extended lengths!! Crazy!)

Gabrielle Rocha Hally Dress, $65 at Zappos

Alternative Apparel Racerback Maxidress, $68 at Zappos

Alternative Apparel Go Fish Dress, $68 at Zappos

(This one seems great because of the ruching at the hips, which would hopefully disguise any.... imperfections, so to speak)

And finally, once I get my maxi, here are some of my favorite ways to potentially style it!

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Any reccomendations? Any favorite tall girl shops? Help a sista out!