review my list please


Hello everyone. I am new to the high end world of home audio/video and am looking to build a system that i will be satisfied with for a long time and hopefully get it done on the first try. Music and Movies will have equal weight so i'm hoping for the best of both worlds. It will be going in our 2 story family room 23'x18'. The back wall is half open to the kitchen and the left side (facing the tv) is open partially to front rooms and upstairs rooms. I know this isn't a great room but I'm hoping it can sound great with only modest acoustic help. I would welcome any comments and suggestions in regards to the list of components I have so far. Thank you.here is my list.
TV- Samsung 85in. Q90
Mcintosh MX123 Processor
Mcintosh 8207 AMP
Focal Kanta 2 towers
Focal Kanta center channel
Focal 300-ILWCR6 surrounds
2X REL S-510 SUBS
Panasonic DP-UB900 Reference Blue Ray Player
Sonos Port Audio streamer
Audioquest cables
ronboco
millercarbon pretty much posts the exact same message to anyone here who is asking a home theater question.  I wouldn't put that much importance on his views, unless you are a 2-channel person only.  You can definitely get an excellent multi-channel home theater system.  You have a very good list right now. 
I appreciate everyone’s point of view. Thanks again. I will definitely post when I have the system in and have been able to spend some time with it. Keep the suggestions coming! 
+ 1 for the Oppo 205.  ( Pjr )
Oppo was the Mac Daddy of Blu-ray and also has exceptional audio, you can play music by CD or DLNA. I have one and use it for movies as well as some audio.
You should be able to find one on Ebay, it will be used but well worth it.

Since you obviously know what you want which is 50/50 music and movies you are on the right path. As long as you understand that you will not get optimal audio with this configuration.

Only other thing I will add is take a look at the Marantz 8805, this is what I have. The 8805 has significant design changes from the previous model to improve all aspects including audio.
I watch movies in 7.2.4 Atmos, when I want to listen to music I switch to my music server and use Pure Direct. Or DLNA from Oppo.

In the future I plan on having a dedicated 2 channel, that way I can have the best of both worlds.

And as others have suggested listen to other speakers and components.

Will
Good evening everyone. I had a thought from reading in the forums and regarding the music side of a system. When people talk about which brand of towers they like I have read very little about a good sub paired with them. Should I look for towers that provide all the bass I want or not be concerned as I will have 2 subs at my disposal. Thanks for your input 
List is fine but the weak link is definitely the Sonus. The Bluesound node 2i would be an improvement but it is still entry level and a better streamer/dac would be well worth the extra expense. There have been plenty of posts to look at re streamers.