Of course they watch Sherlock, 7 has been a fan of Steven Moffat ever since Continuity Errors. He has Press Gang, Joking Apart and Coupling sitting in his DVD collection.
One day he hopes to regenerate into Jack Davenport.
To tell you the truth that would make me happy as well, if we have to replace Matt Smith may it be by the only man who could handle a Cyberman Spank Inferno!