Green Mountain Audio Callisto, but run them full range and crossover your sub for low octives below the Callisto's range, maybe 45HZ or less. The Callisto's are music. You will not want to eliminate anything they do.
http://www.greenmountainaudio.com/Design%20Images/CallistoIntro319by445.jpg
http://www.greenmountainaudio.com/Design%20Images/CallistoIntro319by445.jpg