By honoring Rabbit Hole producer-star Nicole Kidman with a Cinema Vanguard Award at the 2011 Santa Barbara Film Festival (1.27 to 2.6), Roger Durling is saying the Best Actress Oscar race is now a three-way competition — Kidman vs. Natalie Portman vs. Annette Bening. I can buy into that. Becca Corbett, the grief-stricken wife in Rabbit Hole, is Kidman’s best role since her Oscar-winning Virginia Wolff in The Hours, which was eight years ago. And is arguably her most touching.