Have owed both the 787 and LX303. I still have the 303 and I can say hands down it is a better receiver. I was hesitant to go with Onkyo because of the HDMI issues they were plagued with. But the sale price was almost $300 less than the 303 so I went with it. Sound was what I expected from Onkyo, the video was great; until it wasnt. 4k HDR feeds started cutting in and out and the sound also, I felt the back of the receiver ( Which I have sitting on a shelf, not enclosed) and it was hot, like really hot. I turned it off, let it cool down and tried again. Everything was fine for a few minutes until it got hot again. I traded it in for the 303 and I really do believe the Direct energy design works because this receiver never gets hot to the touch, and the sound and picture never drops out. I did like the AccuEq over MCACC mainly because of the independent X-overs, but this is a small sacrifice, the Onkyo bass was heavier too, but I just upgraded to a new SVS sub and thats not a issue anymore. I also had Denon, and Yamaha, the Pioneer is still my preferred in this price range.
P.s. one more thing, I noticed my local audio shop and Magnolia in best buy both still do not carry Onkyo, its not because the issues they had in 2012 with the HDMI, I was told its because Onkyo still has more reliability issues than the other companies. Magnolia manager told me, they lost more money due to returns from Onkyo than Denon, Yamaha, and Pioneer combined. Do what you wish with this information.