Keep in mind that AVR settings are kind of personal, and will vary as the equipment changes. I decided to do a walk through on some of my own Denon X6200W AVR settings, not to proclaim it as the right way to do it, but just to show the way I do it. Some or all of the settings I use may not be right for you, but my hope is that some may benefit from seeing how I adjust my settings and why.
Tip: the Denon X6300 comes with 11 channels now, and the Denon X4300 and Marantz SR-7010, SR-7011, and SR-6011 are all 9 channel, allowing 4 height effect Dolby Atmos and DTS:X speaker configurations, and most if not all offer Auro 3D as a paid upgrade. The Denon X6300 allows 4 height, but also back/rear surrounds as well, I would need to add an external amp to do that with the X6200w. I also really like the Sub EQ HT feature on these units, it does a really nice job.