low back lace wedding dress

Ok lovelies, I need your help...I am doing hair in D.C. this Friday for a wedding party and still need to pick something to wear for the ceremony... WHICH ONE???Floor length lace with rose applique and extremely low back which I will have to find a low back bra for, or the black asymetric bottom, knee length in the front to the floor in the back, this dress has a little more poof than I am used too...all that hidden tulle...please help me by voting #1 or number 2 by 3:15 pm....Thank you in advance.... low back lace wedding dress