Hitchcock Biopic in the Works

I'm not a huge fan of biopics but this project's getting me excited. Sacha Gervasi, director of heavy metal doco Anvil! The Story of Anvil, is in talks to make Alfred Hitchcock and the Making of Psycho, an adaptation of Stephen Rebello's book of the same name. It's kind of surprising that for a filmmaker of such calibre, influence and notoriety as Hitchcock that no one's ever tackled dramatising his life, which definitely wasn't lacking in incident nor story. Word is that Anthony Hopkins maybe playing Hitchcock, though I would also like to offer up these possible candidates:

Tom Wilkinson

Timothy Spall

Ray Winstone

I think Winstone and Wilkinson will need to beef up a bit if they were to play Hitch, but Spall seems a perfect fit... even more so than Hopkins. Is there anyone else who you think should play Hitch? I had thoughts of Paul Giamatti and James Gandolfini but nah...