Good morning to all. Ok, have a build question for the forum. I'm looking to get an 18" BTL soon and was curious as to what would sound the best in regards to sub direction. Room is not an issue as I have an SUV. I'd like to take a poll and get opinions on why you chose the following: 1.Sub up to roof and port to back of vehicle 2.Sub forward to driver and port to back of vehicle 3.Sub to back of vehicle and port to back of vehicle 4.Sub forward to driver and port forward to driver 5.Sub up to roof and port up to roof I'm really looking for ground punding and earthquaking when I want the sub to perform, yet sound decent with pop music as well. I have a broad range of music styles (i.e. hip hop, house, trance, rock, 80's rock, electronic). Thanks for your opinions!