I'm intending for these to be the surround and rear speakers, prob use the sub as a second sub. The receiver is a yamaha 2070. I'm basically building out our family room. I'll probably use my existing Cambridge Soundworks sub for the main. The center is a Klipsch rp-440c I chose due to center height restrictions. I have four meh Polk Audios for the height channels. I'm still looking for some good left/right mains to replace what I have. I figure I'll choose those based on everything else.