I would go with set 3.
Heather will be a bit unusual among her peers, which is a plus IMO.
Louisa is a beautiful name.
I would not go with set 1 because
Rose, although nice, is too plain for my taste.
Heather is OK, though.
I would not go with set 2 because
Emma probably would find herself amongst a sea of other Emmas.
Daniella I just don't find very exciting.