Just my 2 cents on this subject. I have a KP-100s. I found it lacking in volume for even small jobs at time. I just got the Logitech Z5500. More work to set up (I am working on that) but similar in weight to the KP-100s. However, the Logitech with 500 watts is a much better solution IMHO.

I haven't gotten or heard the eminence replacement woofer for the KP-100s.