LIVE POLL: Greatest Hitchcock-Directed Movie Ever Made (Hitchcock 125th)

According to Wikipedia, "Sir Alfred Joseph Hitchcock KBE (13 August 1899 – 29 April 1980) was an English film director. He is widely regarded as one of the most influential figures in the history of cinema. In a career spanning six decades, he directed over 50 feature films, many of which are still widely watched and studied today. Known as the "Master of Suspense", Hitchcock became as well known as any of his actors thanks to his many interviews, his cameo appearances in most of his films, and his hosting and producing of the television anthology, Alfred Hitchcock Presents (1955–65). His films garnered 46 Academy Award nominations, including six wins, although he never won the award for Best Director, despite five nominations." 

Which of these selected Alfred Hitchcock movies do you think is his greatest directorial achievement?  *minimum 6.5+ IMDb-rated