Home Theater Upgrade: Advice Needed

So I am looking to upgrade my HT setup quite soon, however I am having a dilemma as either options for what I am trying to do are limited, or I just don't know enough or research has led me wrong.

What I currently running (not including sources like PS3/4, Xbox, etc.) is a Yamaha V773WA fed into a McIntosh MC206 powering just a pair of Tyler Acoustic D-1Xs. Pretty basic, but this was my first step into hi-fi audio.

Now I am going to get a Lumagen Radiance when they come out with the new version with HDCP2.2 and HDMI2.0 w/18Gbps. However, my problem is how to feed the audio out.

The reason the audio is an issue (in my current mind-state) is because I was thinking of feeding the audio to some kind of multi-channel preamp and then out to the power amp. The problem is that nothing seems to really exist for this kind of setup.

The reasoning for my initial thought of going this route is because at this point, a pre-pro will be unnecessary as the Radiance will be handling the video processing.

So, show me the error in my ways or help me in the right direction please!