#6--definitely like the simplicity and cleanliness of this logo.. i dont like the circles on the E and the R, also would like to see it with deferent font or fonts maybe? a way to reference cars or audio while keeping the simplicity?
#5-- Is great!!! may be too detailed, it hits ALL Points, car reference and has slogan involved, I can see it on The Back of the staff shirts, not sure I like the circle behind car but I know I don't like it without anything like #1