Stuart, love that picture of Johnny Depp as Barnabas with the cane & ring...
And pfffffffffffffffffffffffffft to those who poured scorn on Jonathan Rhys Meyers. He'd be great
and a touch of glam rock chiq is just what Barnabas needs
Clive Owen is my other contender for it - he's another Brit, often mooted as a future James Bond, with a charisma all of his own and a face with a shadow of eternal age.