Hi Jenni --
Another vote for the cobalt -- altered to fit perfectly. Just echoing everyone's comments re you looking happy / flattered in it, it photographing well, and it being a great backdrop.
Looking at the fit it may be a little long in the torso as well as a bit wide (that's seen more in the back). So perhaps a quick hike up in the shoulder straps and side seams taken in to sort things out.
Esp for special occasions, I think it's better to buy the cheaper item and get it altered than to spend more on a less perfect fit.
Agree with metallic sandals...and a possibly metallic-infused scarf could be a nice alt for the one you have -- which I do like with the dress but in group photos could take over a bit.
I peeked at Possible Dress 2 and while I like it better than #1 I see a lot of the same issues. The cobalt is an "uplifter" dress on you.
If you want another to consider, I'd look for a style more similar to this shape-wise, which shows off your waist and legs (tastefully of course!). Something with beading or metallic could amp up the dressiness but I don't think you have to go that direction.