The proper integration of a subwoofer with a speaker or monitor system is more complicated that sticking the two together. The method and details of the transition are critical.I think you can have a great result with any good subwoofer is you use the correct tool to match them up. There is not such a thing as good match for same brand drivers... the hk750 is a good deal if you haven't an external dsp already. For those who have one, there is others sub to think about. Adam sub 10, focal sub one etc.