A few years ago, I spent some time with a "Bo-Jo" congregation that was transitioning to a more "reformed" direction. Great group of folks and I was actually liking where they were going - taking caution regarding the reformed doctrine, not going overboard, etc. They wanted me to give input in making the services more "Contemporary" and I told them that "I like where they were just fine" (Hymnbooks mixed with some good contemporary material). Told them to "stay away from the laser lights and fog machines, and it was OK to lose the ties but no tattoos and "skinny Jeans!"
Oh, and they were using the ESV as their congregational Bible.