I am planning an audio system for my 2016 Camaro. I think I know what I am going to do but I'd like to run it by the community for some tips. I listen to music with headphones so I am trying to replicate that in my system(don't know if that changes anything).

Here is my planned setup:
Audio Control D-6.1200 6 Channel DSP/AMP
Boss Audio Systems R1100MK Amplifier
Front Speakers: Polk Audio DB6502 6.5" Components
Rear Speakers: JBL GTO629 Premium 6.5-Inch Co-Axial Speaker
Subwoofers: MTX Audio Terminator Series TNE212D

I don't like speakers or tweeters that are very bright as they are unpleasant at loud volumes. That is why I went with the Polk speakers. Right now in my car I already installed the rear coaxials and the subwoofers as well as the boss amp. I still want to know where or if my system has weak points. I can always replace things even if they are already upgraded. I know the rear speakers aren't amazing and neither are the subs but I feel they'll work great. If you guys think otherwise please shoot me some advice on what to do.

I plan on wiring this system by using high-level inputs from the stock amp into the DSP. I was advised not to change the radio in my car as there are many features I would like to keep that are on the stock head unit. The head unit only sends digital signals to the amp which can not be interpreted by anything other than that amp and audio interfaces. I feel that a DSP can do anything an interface can do so I opted out of an audio interface. Maybe I'm wrong. Below is a picture of my planned wiring.

Any thoughts, tips, or advice? All feedback is appreciated.