I have a similar figure - 34FF with fairly big hips and small waist. I personally wouldn't wear any of those as they would make me look pregnant again. With the exception of the Cos one as the belt cinches it in.
I have to be honest and say I think those shirt dresses suit our smaller busted counterparts. I would go for something that has definition at the waist and highlights my hourglass figure more.
Hope that helps x