Once you have everything hooked up I’ll be curious to hear about your results with ARC. I’m using Emotiva power amplifiers as well, an XPA-7 with four of their PA-1 class D amps for the my height channels. The Emotiva transparent/neutral sound is a perfect match with the Arendal speakers. Like you I’m thinking of adding the XPA-DR3 for the LCR. Sounds like you’ve got an awesome setup and can’t wait to hear about it once you’re ready to fire it up!!!