Hola Hobess -
Based on the diagram provided above, a couple of things stick out at me:
With the couch in the couch, against a wall, as Tom said, 7.1 will be a disappointing experience. Stick with the 5.1
It's not clear whether the in ceiling speakers are already wired/placed, etc. If they are not, you might consider placing them a little further apart.
If you MUST go with a 7.1 set up, then you should move the rear two speakers to be IN BETWEEN the in ceiling speakers, so the speakers form as much of a circle as possible.
I also notice you haven't placed a sub in the room. I suspect this is merely an oversight in the drawing, though.
Welcome to the forum, though! Have fun and enjoy listening.
