My Aperion Speakers:
2) 632 L/R, 2) 532 L/R, 1) 532 C, 2) 534-SS, 2) 422 rear surrounds and an S-10 Sub.
8 driven by Onkyo TX-SR805
2 driven by Sony STR-DE997
I think you will be pleased with your speaker and AVR choices. My setup has all the punch that I need and then some. Clean, clear and accurate at all volumes.
You may want to consider cooling for the 875 if in a confined space. My 805 runs really warm when not cooled by the PC case fans I have installed.
I am not a big fan of Monster Cable since I think you pay a lot for the name. I do have a few Monster interconnects for my setup, but I found them at “O” for a good price. I used 14-gauge wire from Lowe’s with a Philips trademark for the speakers; probably an overkill in size since my longest run is less than 40 ft.
Once you get that system setup, you will probably not want to leave the house.
Jack