I'd say the key here is also to get (and stay) in touch with the profs in question. At this point all departments are trying to figure out what the different options are (not just who they want, but also who they are likely to get), and the best way to assist them with that is to have them understand where you are at, and what you'd need to accept. Doesn't mean you're going to get that, but it seems to me by doing so you are making their life easier, and thereby increasing your chances.