Do you like his fiance? If you do, I'd steer away from the first one. There's a lot of black in that one. When I think of weddings and new beginnings, I think of white. When I think of funerals and endings, I think of black.
I think the third has too much blue. Therefore, I like the second one best. Are you considering any lighter colors? Again, when I think of weddings, I think of lighter colors. Congratulations to your son and his fiance!