Finding copyright music

Finding the music for our thriller has been very difficult as we have found lots of great music but not all of it will fit with the scenes.

We have tried to find music on many different sites but the main ones we have decided to use are

http://www.purple-planet.com/  and http://www.unsigned.com/

and

http://incompetech.com/

We've decided to use some music that has been described as dramatic and tense.  Also, we have found an edit of a song called 'turn around look at me' which fits perfectly with a specific scene in the thriller.

During the thriller there is a part when the Detective walks out of the classroom and walks down the corridor.  Before the 'turn around look at me' we thought we could have a Dj scratch.  W put in the sound however, we found that it made it sound childish and so we didn't use it.