I have a set of both 5Jrs. and 4's that instead of tossing and starting over, I'd like to use for "theater sound" for my HDTV. What center and subwoofer should I be looking for (either new or discontinued models). I'm very happy with the sound of these great speakers but I'm overwhelmed about matching a center and subwoofer. Thanks-- I'm definitely not a techinical type of guy.