I am getting an SVS sub for my small 350 sq ft apartment. I can not play it at exreemely loud volumes for worries that I might really annoy my neighbors. I am looking for some thing that is has a very tight and accurate sound to match my Norh 4.0's. Which one should I get the 16-46CS, 20-39CS or the 25-31CS. Price is not much of an issue in this range.