I am having a new house built. My family room will have a home theater system, but I am also having my patio pre-wired for speakers. I own an Onkyo receiver that is set up for multi-room audio, but you need to power the speakers in the separate room. I am looking for opinions on the best way to do this AND the most cost-efficient way (i.e. powered outdoor speakers, separate amp/receiver or speaker selector box). Any opinions would be greatly appreciated.