I liked the 2d one the best. WIth the first, I did not like the large black swath at the neck-- it might draw attn to your chest since it will not be as flat... but its definitely worth a try on.
I LOVE the 2d one! I think it's perfect.
As for the 3d, again, with larger chest, that sheer part may "poke out" too much and show the top part of your bra or something, but again, I think if it doesnt show stuff when you try it on that it really is a darling dress!