Hi Henrik,
Thanks for the detailed reply. I should clarify my needs:
1) Forget wireless rears, I will run wires, it's not that bad.
2) My goal is to connect my home theater in the living room with speakers in 2 bedrooms and one bathroom so I can play music throughout the house. Ideally, controlling volume separately would be great. I don't need these things to be completely wireless. I realize there are systems like Sonos out there that let you connect a house full of speakers, but I was hoping to use the Klipsch I have. So my real question is -- what is the most cost effective way of connecting my living room receiver to speakers in 2 other rooms? I know Onkyo RZ 830 has wireless features, which is why I asked about that, but I realize I need to have something that receives the wireless input. Also, I'm not sure if the Onkyo can control 3 separate rooms at once. My goal is to be able to play music through my Onkyo receiver and hear it throughout the house simultaneously without having to send wires through all the walls into the rooms. Is that doable within reason?
It's a condo, so a bit more difficult to run wires through the ceilings as there is concrete in a lot of places.
Thanks!