Natalie, I admire your desire to quickly revamp your wardrobe, but your quest for a DVF might not be as quick as you'd like. It may take a couple seasons to find the perfect DVF. If you travel, I'd recommend waiting until you can go in person to a DVF shop so you can compare all the styles and fabrics in person. You might spend a couple hours there, but you will likely leave with a perfect dress and the ability to better gauge DVFs when shopping online. Think of it like Anne Fontaine - the experience is much more personalized and accurate in a brick and mortar shop.
Rambling aside, I do like #1 on you. A DVF in silk jersey will be like that dress, but feel nicer against the skin and be slightly thicker as well. If you only take one piece of advice, listen to me about the silk jersey. It is incredibly soft, high quality, thick material that will hide a multitude of sins while feeling like you are in pajamas.
The knit wool of dress #3 is super thin compared to the silk jersey. (if you want wool, go for the wool jersey.) Also, the tiny pattern is not an ideal pattern either. Typically, the larger the print, the greater the camouflage factor. Also, more random, abstract patterns camouflage better than repeating geometric prints.
I would keep #1 if it is washable as the DVF likely won't be and try to hold off on purchasing the DVF until you have more time to explore the options available.