I like the dress modgrl posted, as a wrap dress will be so incredibly flattering on your curvy figure. I prefer dress #2 that you posted, but would urge you to try it on to check the drape and length of the dress. Most flattering is going to be just above or on the knee.
I just wanted to note that you should also consider the shoe you'll wear with the dress and I would like to suggest you possibly consider a shoe with a heel in a neutral colour and without ankle strap. This will help elongate your legline and avoid "cutting" your leg short. I'd definitely avoid a black shoe! (I thought I'd put this in, just in case you haven't considered this aspect yet.)
Good luck with your search, I hope you find your dream dress!