I am curious how your design ultimately worked out and what equipment you finalized on. Some of the components in yours I have, too.
My system is composed of a Runco VX22d, Stewart Cinema Curve, Revel Ultima 7.2 speakers (two Studios, 1 Voice, 4 Embraces and 2 Sub-30s) plus two Velodyne MiniVee 10s as rear-sourced reinforcement of the bass, Krell amplifiers (FPB 200C, KAV-250a and KAV-250a/3), Theta Digital Casablanca IV preamp/processor, Oppo 103 player and a mix of Transparent Audio and Kimber Kable cables.
With the utilization of the Dirac equalization software in the Casablanca, I have reached the level of performance for which I have always aspired -- simply superior to what can be provided at any commercial theater by a wide margin.
While I could "upgrade" to Atmos, etc., frankly I don't see where the substantial incremental expense of tearing apart walls and ceilings would provide commensurate improvement in sound quality. As for the video, at some point I suppose I'll employ 4K, though that is an expense which cost makes me shudder.
