I'm choosing to rank No Country For Old Men as my personal number one. I feel that despite the extremely high quality of the majority of the films by Joel and Ethan Coen, No Country is such an immersive experience, and derives straight from the novel whilst somehow branching out at the same time. It's a real skill to be able to directly take a cat and mouse chase and make it inherently interesting, because you need great vision to turn it into something extraordinary. The way it wraps all the characters in with each other and have this triangle that is connected by a higher law or fate is marvellous and the way in which the critical audience have taken to analysing the film in-depth speaks for itself. It's in the upper echelons of great films and very reminiscent of the type of films Hitchcock used to make in terms of unbearable tension and suspense.