I bought a home with 5 sets of in ceiling speakers. 1 set in the family room, dining room, kitchen, master bedroom and outside. I just bought an Onkyo TX-NR808 receiver. I plan on putting a 5.1 or 7.1 system in the family room, but I am unsure how to power the speakers in the other rooms. I have read about speaker selector boxes but I am afraid to try and power all the speakers with the Onkyo. These other speakers will not need to put out loud music, and will not be used very often, they would be nice for background music during parties etc. Any suggestions on how to power these speakers in a cost efficient way?