Soundtrack to the Thriller Opening

For the soundtrack of our thriller opening we originally planned to have 'Montagues and Capulets' from Sergei Prokofiev's ballet 'Romeo and Juliet'. This piece of music is authoritative and threatening which corresponds to the film’s theme of betrayal and deception; we could also relate it to the character of one of our male protagonist, Patrick Callaghan (see character profiles for more explicit information). In addition, it would give our thriller a classic approach as it is a classical soundtrack. Unfortunately we could not use this soundtrack because it was against copyright terms and we had to find another soundtrack that was not copyrighted.
Eventually we came to the decision to have a more modern style of music: something that gives an indication of urbanism and conveys a more sinister vibe to it. We had an idea that it would be something along the lines to the soundtrack in the opening sequence of Sin City.
After this decision we searched unsigned band websites and listened to soundtracks by people who are listed under the Creative Commons License Agreement. Consequently this is where we found our soundtrack to our thriller opening - it is an instrumental song by The Servant called Cells. We downloaded it from the website…

http://www.airmp3.net/search/the_servant/cells/mp3/a

…and edited our opening so that some of the scenes would come up at the same time as the beat of the music. This, we found, predominantly effective in the sense that it really conveys a sinister vibe and gives the thriller a more contemporary style.