I currently have RF62 II as my fronts, RB61 II, as my sides, RC62 II as my center. I am looking to add rear surrounds to complete a 7.1 setup. I am looking at getting a pair of the RP-240S. Since my set up has 6 IN woofers all around, would the RP-240S be underwhelming with their 4in woofers? My seating area would be a little over 6ft from the placements of the rear surrounds. Any guidance would be greatly appreciated.