I must disagree with the gentleman who posted that music is not a salvation issue. The music we listen to, and especially that we play or sing in God's house, is definitely a salvation issue, with eternal consequences.
Music is the only form of communication that makes it into our consciousness without first passing through the frontal lobe of the brain, where the will is centered. So music can "get in our minds" without any conscious thought on our behalf. Satan knows this, as the former leader of the heavenly choirs. That's why it's really dangerous to de-emphasize the importance of music, and the proper type of music, in the life of the Christian.
Dr. Samuele Bacchiocchi has done a good study on the subject of music entitled "The Christian & Rock Music" ( http://www.biblicalperspectives.com/rockbook/index.html ), where he draws lessons from the musical instruction given to the Israelites for the ancient temple services. Certain types of music and instruments were prescribed, and other types of music and instruments were not included for sacred services.
So consider it: would the God Who incinerated Nadab and Abihu for offering strange fire (Lev. 10:1-2) tolerate a heathen style of music to be played in the temple, in worship services? The answer is, obviously, an emphatic "NO". Why, then, should we tolerate it, even approve of it, for use in worship services now?
"When turned to good account, music is a blessing; but it is often made one of Satan's most attractive agencies to ensnare souls. When abused, it leads the unconsecrated to pride, vanity, and folly. When allowed to take the place of devotion and prayer, it is a terrible curse. Young persons assemble to sing, and, although professed Christians, frequently dishonor God and their faith by their frivolous conversation and their choice of music. Sacred music is not congenial to their taste. I was directed to the plain teachings of God's word, which have been passed by unnoticed. In the judgment all these words of inspiration will condemn those who have not heeded them." -- Testimonies, vol. 1, p. 506.
Here we have poor choice of music directly associated with judgment and condemnation. Music a salvation issue? Most definitely.
Furthermore, putting a rock beat with Christian lyrics and calling it sacred music, is akin to Roman Emperor Constantine marching his pagan troops through the river ford and calling them baptized. As we say here in the South, "that dog won't hunt".