Don't know if this has been mentioned but...
I heard the Coens say that this film was their Western version of Bresson's Balthazar (Au hasard Balthazar). At first this sounded like an off-handed remark upon closer inspection there are certain traits they share with Besson's film. The only thing I will say is that there is a connection between Chigurh and Balthazar as they are both anchors for their respective films, yet not the main ptotagonist in either.
I won't go into a diatribe on film theory at the moment but I thought it was funny that they named one of the extras on the DVD "Diary of a Country Sheriff" similar to Bresson's film title Diary of a Country Priest.
As I mentioned before, hope I'm not being redundant here nor stating the obvious.
With the Coens, there is always something hidden just beneath the surface. I love that about their films...