Well, all right!
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My 16 Channel LS50 + SVS 2000 PRIR works, and sounds really good!!! Tried a coupla offerings on Netflix, two in Atmos one in 5.1 and the picture was spectacular sound was good to spectacular as well. When I used the HD 800 it had a metallic sound, but with the LCD-X it seemed to be in the Goldilocks zone. I will have to look at some kind of reverb control and/or doing some additional EQ with the HD 800, but I think I can figure it out. The soundstaging seemed to be there, and no question about this being a wide open "out of head" experience, and headtracking worked splendidly, but the cable is a true PIA. Understand a cordless headtracking unit on is on the "to do" list, and personally, I'd prefer to see that happen before DTS-X, b/c snagging that cord could create a real tripping hazard and prolly break something on the A16 as well.
The experience was definitely enhanced by my Subpac SB 20, and by the NVIDIA shield. I have no words for the video quality the Shield renders. It's just perfect. I could not be happier with it. The Subpac tactile subwoofer, once I got it properly set up, definitely added a great deal to the realism to the experience as well.
I think a better PRIR would sound even better, though this one is definitely on the right track. Next time I take one I'll concentrate much more fully on getting everything (especially the angles for the set top) just right. But for now I'm just going to enjoy this for a week or so, because it's so very enjoyable.
I also need to see about getting my Chromecast Audio to stream, or maybe I can even use my original AV Chromecast to stream audio into one of the HDMI inputs. I'll work something out. Just want to relieve my very noisy PC of as much home theater duty as possible.