My Legacy Calibre XD's are very impressive speakers. I do use a sub but I have to be careful not to rattle pictures off the wall and get served with divorce papers. I'm sure the Signatures are amazing. I like being able to turn the sub down when needed. I bi amp my Calibres with a Rogue Cronus Magnum.
I hope to move up to Focus XD'S or Aeris in the future. Legacy rocks!