I've got a wild idea! Let the user do it both ways. It could even have a place to select which model the user prefers (they could even have a window where the user could decide which one they prefer and call it Preferences). I think I remember seeing something like this before in Mail, or was it iTunes, I know it was the Finder, naw maybe it was... Note to self: better trademark that term 'Preferences' before someone else claims it is too generic.