Michelle, it really stinks that you didn't feel good in the turquoise dress. I do know that feeling, however, and the way you feel in a dress is SO important. So if you want another, so be it!
I actually like several of the dresses on that site. Like everyone else, I think the Vivienne Cinch Dress would be great on you. It is a faux wrap style with a very subtle (not too twee!) ruffle around the wrap edging. We all know cobalt would be a fantastic color, but I'll throw a wrench in the mix and say if you feel like you already have a lot of cobalt, I think that the amethyst would also be a great color on you.
I can't remember if you like black in dresses, but if you do, I agree with Julie that the Scalloped Boudoir Lace Dress would be great. It has a wonderful v-neck and three quarter lace sleeves, which I think would be great, because I know you are self-conscious about your arms (not that you need to be!), but the lace will still allow for some air to get to your arms. The entire dress has a lace overlay. I also like the retro glam dress, which is similar to the Boudoir dress, in that it is black with a black lace overlay. The has shorter sleeves (a few inches above the elbow, whereas the Boudoir dress has sleeves that hit slightly below the elbow), which are also a single layer of lace. It also has more of an a-line to the skirt and a belt to show off your waist. The neckline is a surplice neckline and it's tough to tell, but it appears that the hem might hang slightly longer at the sides. I actually think this one might be more flattering for your figure than the Scalloped Boudoir dress, but there is only one way to find out!
I also really like the Sienna Dress, in either red or purple. However, that dress is sleeveless, and I know how you feel about that. It has a surplice neck that has a wrap look, but the rest of the dress is not a wrap. It looks like it has a red underlay with a black overlay, in a chiffon-type fabric. There is a wide waistband.
I also like the Francesca dress, but it has a portrait neckline that falls just off of the shoulder, so wearing a bra with straps would be difficult (and a strapless might also be difficult because it is definitely low-cut in the front). Finally, I think that the Blooming Horizons dress would look great on you, but I worry it might not be quite formal enough for more formal events. It is black with a v-neck and elbow length sleeves, with a turquoise waistband and a turquoise pattern on the bottom.
I think that a lot of these dresses are perfect shapes for you: v-necks, sleeves, defined waistbands! I definitely think you should try some on and take photos for us, because I think you're going to look great!