It depends on what you want to use it for. If you just want to entertain yourself, then it's hard to beat standing in the "sweet spot" created by a stereo field in your living room or basement. If you are a serious entertainer and you want to deliver a clean, crisp sound to all areas of a large room, there is no better way to do it than with a PAS. This is a completely different type of sound wave we are talking about here. It penetrates the room like nobody's business, with little or no distortion. It uses the natural dynamics of the room to create an amazing performance. And the real beauty of it is the sound does not change according to where you are standing. What you hear in your perfect little spot behind your keyboard is what everyone else hears, no matter where they are. Unfortunately, this kind of technology is expensive; but if you think "I have to have 2 units so I can have stereo", you are thinking along the wrong line. The PAS makes the change from Stereo to Mono quick and easy once you perform with it. If you have a hard time believing this, do the 45 day free trial offered by Bose. You have nothing to lose and everything to gain as a performer.