Originally Posted by _tk
My Marantz AVR can "stream" from lossless files on my PC, the USB stick in my router, etc. It also works fine locally via a USB stick plugged in. It sees my entire network. IIRC the Yamaha can do much the same via the app.
There is no benefit to having a RPi act as a media server unless I'm missing what it is that you want to do. Basically, aside from software, you're duplicating what your AVR can already do via the app.
Also, all class A/B amps with similar WPC will run about the same temperature, but a lot of that depends upon how much of a load you are putting on it (speakers, volume, etc). If you truly want a cooler AVR, then you need to get one that's Class D.
A non-working USB port would be unacceptable to me.
You're willing to stream; I'm not, at least, not from my main LAN.
I have my router set to three separate LANs: "Main," "Guest_VLAN (Virtual LAN)," and IoT_VLAN (Internet of Things). I don't know where my guests or the IoT have been, so I don't let them on the Main LAN. None of the LANs can communicate with another LAN or with one another on the same LAN/VLAN, and only the Main LAN can can communicate with the router's admin page. For some reason I cannot run AirPlay or Yamaha MusicCast on anything but the Main LAN, which is unacceptable to me, as it obviates my security setup. This latter, as well as the USB problem, is the reason I spoke to the tier 2 Yamaha customer support representative. He was unable to suggest any way to allow the VLANs to stream, saying, "You have to be on the main LAN, the first one that shows up in WiFi."
Even if I did get streaming to run on one of the VLANs that would still mean I'd have to put my computer or iPhone on that same, untrusted VLAN, or buy a old Android phone somewhere for just streaming, and then I understand I'd effectively be using the Android's DAC instead of the Yamaha's, unless I'm mistaken.
OTOH, if I'd known all AVRs are about as hot as the others, I would have bought the Marantz.