Harp, welcome. Yes, depending on what you mean by "punch", you may be in need of main speaker or subwoofer advice, but it's highly unlikely that you need amplifier advice. Your 875 has plenty of power to play those speakers at levels that won't damage your hearing , or even a bit more. You may be looking at the least likely suspect to solve your case.

A "more dynamic soundscape" comes from the source material, not the equipment.

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Enjoy the music, not the equipment.