Currently I have an 65 inch LG UHDTV and a Onkyo R391 reciever/surround sound. I know the reciever is not 4k like the tv, but I am wondering if the video is being degraded at all? The picture isn't bad at all but I'm wondering if it would be better taking an hdmi straight from ps4/ Xbox one straight to the TV and use the reciever for audio only?