By adding music you are giving the surfer something else 'not to like' Its highly unlikely that you music choice will be the same as a surfers. Therefore unless you feel a particular clip needs it, I wouldn't waste your time and money having a porn track created for you.

That said if you do chose to go that path, I have a very good musician who will create about 2hrs of music for your at a very reasonable rate.

We have our own backing track that goes from low energy to cum shot speed and I think we have used it twice when there was a soundtrack distortion problem on our original tape.

Hope that helps in some way