Has anyone tried the Bill Dickens sub and /or Signature 212? How about the Gordo or Whappo Grande? I am upgrading and looking for something that will give me a very solid and LOUD deep tone down to low B. I have plenty of power---a Crest Pro 200 8200 and an Alembic F1X. My main bass is a Sukop five. I like my sound to be felt as much as heard. Suggestions?