I know this has probably been asked over & over, but here goes again... Are there any good (distortion free) subwoofers available for under $300 ??? I am just looking for a bit more punch on the low end, but I definitely do not want to add any distortion to my current arrangement. For my current set-up, I have Wharfedale Emerald towers up front and they actually do a very good job of producing solid bass (without distortion) given the drivers are only 6" or 6.5". I have never cared for bass heavy music, but I am starting to become convinced that a subwoofer would add to my movie watching experience. A couple of subwoofers I've contemplated are the HSU line and a Mirage Omni S8. Would I just be wasting my money if I spent only $200 to $300 on a subwoofer ?