Sony got a new line out. Their new sub can handle some serious power with the right box(proboxrocks.com) Awsome! For the buck sony is the way to go. Much respect to sonythey came a long way. Keep this in mind and I know all the pros will agree: "IT'S ALL IN THE BOX TOO!
Mixed-match For a cheap buck go kenwood ei or excellon series. They put out an ear jigging sound to complement your bass which is the perfect system: Clarity and Bass at a equal is best.