Definitely in my top three films ever. Collateral manages to get the right balance between action and a multi-dimensional plot. At times the suspense is phenomenal, and while there is violence and gore, it is superbly done and integral to the story rather than being gratuitous and repetitive. The storyline is gripping and frequently surprisingly moralistic and thought-provoking, and the gunfight in the Fever club shows some outstanding choreography coupled with a great trance/electronica tune (an Oriental-language version of "Ready Steady Go!" by Paul Oakenfold). Excellent film all round with a great cast and an excellent storyline: buy it.