One of Nicole Kidman’s finest and most unsettling performances to date is that of Suzanne Stone-Maretto, a fame-hungry small-town weather girl with dreams of reaching the prime-time big time just like her idol, Diane Sawyer, in Gus Van Sant’s 1995 black comedy/thriller, “To Die For.” Unlike Stone-Maretto, whose news-casting dreams are derailed by a murderous affair with a high school student played by Joaquin Phoenix, Sawyer’s career tract from Midwestern beauty queen and weather girl at WLKY in Louisville, Ky., to former “Good Morning America” co-host to current host of “ABC World News” has been a little less, well, sordid (that is unless you count all those years that Sawyer was believed to be “Deep Throat” in the Watergate scandal).