It's the AVR360, lowest wattage in the bunch from Arcam, at 75watts per channel (small apt). All of the circuitry and processors are Identical across their entire AVR range, only difference I can tell is wattage. As for speaker configuration, I have two KEF R300's bi-amped, with their slim center. No rear or sub. Cables are Signal.
Running music through it, I just Airplay over Appletv, which I think is my weakest link, which is why I've been investigating a DAC with Airplay. I will try burning a CD and playing through the BR as an experiment. Kind of curious if that will affect anything. HDMI can transport more data than SPDIF as far as I know, so I shouldn't lose signal there. I'll reply back if it makes a difference.
As for the DAC part - I'm keen to have something easy to use with Airplay or Bluetooth, but prefer Airplay.
Thanks for replying back!