I have bought Norge 2060 amp: 80W at 4 ohms. Looking to buy Diamond 9.2 or Polk TSi 200 to pair. Have auditioned diamond 9.1. It does hear good except the bass. I need a little more punch from the BS. My budget also limited to <20000. How is Polk TSi 200? Is it good in midrange and bass? Not so particular about the highs.