As the title said I am looking for my first sub. My max is $300. I was looking at x-sub ($200), HSU STF-1 ($270), Velodyne DLS-3500R ($285), Velodye VX-10 ($179). I have a friend that just bought a new sub and was selling his old B&W AS'6 for $50. My room size is ~1500 cubic ft. Any ideas or suggestions will be greatly appreciated.