I don't think they need to be of the same power but I do think they should be of the same "family." I am using Klipsch Heresy mains and since they have no "matched" center (except of course, another Heresy) I use a Klipsch Academy center...close as I can get but I don't (right now anyway) listen to music multichannely (sp? smile
so I enjoy 2 channel through...2 speakers.
there you go.
Bill
_________________________
Outlaw 1070***3 Klipsch Heresys Across the Front W/Crites CT-125 Tweeters***Klipsch KSP-S6***Oppo BDP-83***Outlaw LFM-1 Plus***
Panasonic SA-XR 57***Klipsch RB-5s***Klipsch RC-3***Outlaw Audio M8***

...Let the Movies and Music Play...