I agree 100% with Dar. I have owned Maggies and you will spend the rest of your life trying to match a sub with them. The best I have ever heard Maggies sound is in a bi-amped system using tubes to drive the mids and top end and a Crown Macro to drive the bottom end and a Bryston 10B crossover. Crown Macro's can be had for about $1600, the 10B for about $700. Used with high quality interconnects and speaker cable the system can be very special.