I never liked the Polk SDA speakers on the numerous occasions when I heard them at a local dealer, they were always "dark", muddy sounding and too thick in the bass. I know some members here have gotten them to sing (you might check the best speakers threads, I think I saw someone there who has them and loves them), but I never could understand why anyone thought they were that good. There are a lot of speakers, such as the Mirages mentioned above, that I would call better buys.