From what I can tell, Christian rock in the 1970's was kind of a lame imitation of secular rock. Now, Christian rock has emerged as a powerful creative force that is in many ways setting the agenda, not just parroting someone else's ideas in a "Christian" way . . .
Of course, Christian artists borrow some themes and ideas from other contemporary music genres, just like the Wesley brothers did when they were writing their hymns in the 1700's, but God (the one who invented creativity) is inspiring some really powerful stuff in the Christian music world . . .
It's cool with me if your church likes to do classical music, as long as you don't mind if my church likes to rock!