1. Have not done a significant amount of troubleshooting but while watching Guardians 2 the Atmos configuration that displayed on my 4300 didn't show the right front Atmos speaker via RP280FA. Anyone else have a similar issue? May just be that disk, I did check the connection at the speaker proper and no issues. Haven't checked on 4300 because access is a bear, going to try another disc tonight before checking 4300/changing banana plugs and wires out.
2. While I dig the RP280FA's, I don't love the 450C. In fact, it's my least favorite part of my system but a wide mile. Anyone have experience utilizing the RP280FA's as rear surround? I thought I would get the added benefit of upward firing atmos channels back there, whereas I can properly hang downward firing atmos speakers from front. I just don't get much action out of my rears currently, RP150M's, and think I may just be better off selling the 280's with 450c as a set than repurposing.