I also really like
Virginia, despite it being not my usual type of name. It just flows so beautifully, and I love its strength and poise. It's sort of a "conservative" name, but it's got some spice to it, like
Vivian does.
I rather like
Rita Virginia or
Virginia Rita as a combo, after my great grandmother
Rita, who had that same icy, reserved elegance with an undercurrent of fire. Or
Virginia Marguerite :)
Of your combos, I really enjoy
Virginia Rose and
Virginia Catherine (though I confess to preferring
Virginia Katharine, because the name
Virginia really epitomizes that Hepburn style), and
Virginia Alice.
Virginia and
Susanna would be lovely as sisters! So lyrically colonial.