Oh my gosh that's a crazy timeline! I just read a story two days ago about a woman who adopted the boy her parents fostered. Same situation as your but not the super speedy adoption. One weekend to choose names? Did you like the ones they chose? lol.
You mention your very supportive husband, which I don't have, which is why I don't believe I can handle a sib group yet. I do like the idea of an older child. On one hand I want to have a narrowed age range but on the other hand I want to leave it up to the agency. I don't know what to do!