As someone very knowledgeable once told me... "Bass is slow ... It is the high frequencies that provide the illusion of speed."
There are many factors that can affect bass performance and before ditching the Paradigm you might try optimizing its performance by fiddling with its location in the room, crossover frequency, and phase control. I got my Servo-15 to mate seamlessly with InnerSound Eros electrostatics (which are very fast speakers), so something may be wrong with your set up. Bass is extremely room-dependent and simply buying a more expensive sub may not solve your problem...
There are many factors that can affect bass performance and before ditching the Paradigm you might try optimizing its performance by fiddling with its location in the room, crossover frequency, and phase control. I got my Servo-15 to mate seamlessly with InnerSound Eros electrostatics (which are very fast speakers), so something may be wrong with your set up. Bass is extremely room-dependent and simply buying a more expensive sub may not solve your problem...