Okay, Dan; you just have to spend that "extra cash"(I've never had whatever that is)and don't want my suggestions for 50 classical CDs. "Slightly" would also apply to the sub change, but better than a different one would be getting a second of the same and positioning them(mid-points of opposite walls or diagonally opposite corners)so that the bass response in your room is both stronger and smoother.

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Enjoy the music, not the equipment.