I currently have a 12" Klipsch sub that points towards the floor. I have noticed that it doesn't have the same punch that it used to and it vibrates quite a bit. My budget is around $1,500 - 2,000 for a new sub. I had an email sent to me the other day recommending a sub. Here is the link: http://www.audioholics.com/subwoofer-reviews/rythmik-f18-fv18-fv25hp Is the f18, fv18 or fv25hp a quality sub? Does anyone recommend it or any others in my price range? I am also in the market for all new speakers, would you guys recommend getting a matching sub to the speaker set? Side note - my sub slides all over my hardwood floor. What could I use to keep the legs in one place?