That's amazing! Sounds like the published specs on the 1000-3 are extremely conservative. It would be difficult for me to justify stepping up from my M5/180/1000-3 combo in a <2,500 cuft space, especially with the 180 doing the heavy lifting in movies. The only downside on the 1000-3 is the lack of XLR inputs, but I'm not sure that they're really necessary for 3-ft interconnect runs.

I had a chance to watch a bit of Spider-Man: Into the Spider-Verse (4K Bluray w/Atmos), and it sounded phenomenal. For me, -10 was quite loud, and -15 was comfortable.

I also listened to a bit of Miles Davis' Kind Of Blue (Legacy Edition, FLAC) and found it hard to tear myself away to go back to work. I've tended to stay away from upmixing modes for music listening, but the effect of all 11 speakers working together in Dolby Surround (Pro Logic on steroids) is pretty incredible. Closing my eyes, it was easy to forget that I wasn't listening to live music.

Axiom M5HP VP160 M3 ADA1000
Anthem MRX 720
SVS SB-3000 (dual)