So Amazon had the price at $549 for the 787 today so I had best buy price match and brought one home. This is (maybe) replacing an Onkyo TX-SR805 THX Ultra2 receiver from 2007 that still works great but doesn't support Atmos.
My first thought on unboxing after moving my old receiver is that there is no way this thing will play loud enough. It probably weighs half of what my old receiver weighs. The old one tested out at something like 120 watts per channel all channels driven.
I don't have ceiling speakers yet so I set it up as 7.1. I have B&W 603 S3 L/R and HTM7 center channel, with BW selectable di/bi polar on wall L/R surround and in-wall back surround speakers, B&W ASW650 and SVS 20-39 PC+ subs.
AccuEQ set the crossovers at 40 hz for LCR, 50 for side surrounds and 70 for back surrounds. I upped the LCR to 50 and side to 60 manually. (question here, are only the sounds below the speaker crossover being sent to the subs?) It set the sub level at -15 so I moved that up to -5 during testing.
I tested it with the giant robot and pursuit scene in Terminator Salvation and then the final dino fight in Jurassic World. I did not get it up to reference volume which someone said was 82. I never got it above 73 and it was plenty loud and sounded good to me. My room is almost exactly 2000 cubic feet so I guess the THX Select rating is accurate.
I like the fact that the volume shows on screen--something the old 805 won't do through HDMI. Also nice that I can add another device as I was limited to 3 on the old receiver. The receiver is in a closet off the theater room so you can't normally see it but I do miss being able to confirm what surround format is playing by checking the display.
Best buy is in their holiday returns period so I have until January to take it back. I am going to add ceiling speakers and test Atmos and then decide if .2 atmos is enough or if I think I will need something that will do .4. I will also tweak the settings and watch a few whole movies and provide more feedback regarding receiver performance.
Right now, if I do not feel compelled to get .4 atmos I will probably keep it.