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
For general music, the Kanta 2 might be okay without a subwoofer.  I haven't had direct experience with these, but I seem to remember they are kind of light on bass (I could be wrong).

The REL subwoofers are extraordinarily clean and smooth.  If you want really good resolution, they are excellent.  If your primary purpose is music, they might be a good choice.  But they are not meaty sounding subs and if your primary purpose is home theater, I would look at a really good vented sub, like something from Rythmik.  There's a definite difference in sound between a sealed sub and a vented sub
Again many thanks for all of the great input! I’d like to touch upon the mx123 and get some advice. I’ve been reading that the marantz 8805 is every bit as good as the mx123 at a much cheaper price. And that they are also sisters in many ways using some of the same tech. Should I save the money and get the 8805? Is the 8805 a good pairing with the mc8207? 
Ronboco

I sent you a message, I know a Marantz dealer that could give you info on the 8805 vs the McIntosh.

I have a couple of Emotiva amps with my 8805, not sure how the MC8207 would work. Someone else may know.

Will
I’d like get some input on the cables I have on my list too. Will the audio quest be adequate or is there a better alternative. Thanks ! 
I've tested the 8805 in my system.  It's an excellent processor for the cost.  Large power supply and discrete analog output stages.  Very good bass, punch and midrange body and fullness.  However, it is voiced slightly warm with slightly rolled off high frequencies.  It's a great product.

I haven't heard the MX123, but it's also very well built.  I don't know if it's similar to 8805 or if it has better high frequency response.  Either product will likely,

I wouldn't recommend Audioquest HDMI cables.  They did not perform well for the price you pay.  Audioquest interconnects and speaker cables are good.  So are the power cables.  There will be a million different opinions on the best cables and this is a "can of worms" question, lol.

I would recommend older WireWorld Series HDMI cables that do not have the DNA Helix design.  The older Silver Starlight 5-2 or Starlight 5-2 or 6 are excellent.  If you're on a budget, the Neotech NEHH-4200 HDMI is excellent for under $100 and will perform as good as the much more expensive WireWorld 7 Silver Starlight.