I just bought a 4k Hisense Roku tv. The quality is not great. It is grainy and doesn't focus well during motion shots. I read where you used to be able to change advanced display settings in the home menu, but it's gone now. Believe me, I've looked. It's not on the app menu, either. Is this the case with all Roku TVs? It seems that most TVs are Roku TVs now, but I don't want to get one if all the menus are the same and limited.