There is a reason that the forte line has been the best-selling Klipsch Heritage model since its inception, back in 1985. What sub are you using? I have owned forte II for over 30 years, and now own forte IV. From a music standpoint, a sub is not really required unless you are looking for the lowest octave in organ music, etc. The forte bass is very punchy, and although it struggles below 35-38HZ, it almost sounds an octave lower due to no distortion. If the speakers will be dual use for movies etc. it is still debatable as to whether a sub is needed, unless you are looking for sub terranean bass. Purchase the forte IV and you will be set for the next 30 plus years. Do not discount a nice used pair. I bought a month-old perfect condition with boxes and inserts, etc. for 2K less than new.