The side surrounds seem to far back for 7.x setup. Also the front L/R appear to be way to far forward at 8'6" into the room, also don't see a center unless it is not labeled.

Its a work in progress. :-)

At one time I had every speaker the same distance from the sweetspot.
That's what I'll end with if/when we start the build.

My room currently has every speaker equidistant from the middle of my couch too. I just hope my new room sounds as good as the one I'm using now (it probably helps that this one is slightly octagonal, so it doesn't have any 90° corners).

We looked at a few different sizes and designs.
We even considered a round room.
This worked out because it could be built to stand alone, be built on to or fit across the width of our next basement.
Now that the "ideal" size was shown we'll look at it again.

That is a nice big room, I am surprised at only 3 seats. Otherwise I have nothing additional to add to the above comments.

UNPOSSIBLE!!!!

What's the distance from main seating to TV screen?

Also, am I seeing 3 EP800s?

The goal will be 10' from the screen and each speaker.
The exception will be the center which is +/- 12' and will be behind the screen when down.
A second row of seating isn't out of the question. I do want to avoid having too much furniture. I'm a little crowded now with half the cubic feet.