Hello, I moved into a house a few years ago with a great whole home speaker system. I've used the receiver that was left for me since then but am thinking of upgrading. The speakers all feed into this receiver through a speaker selector or directly into the receiver. What would be a good replacement for this? I have a small tv hooked up to the receiver but it's main purpose is to send sound to the speakers through the house (I'd love to be able to airplay from my phone throughout the house for one!). Thanks for any help!