My TV room is about 12 x 18. I have a big Wall TV Unit that covers about 10 ft wall of the narrow side of the room.
My sofa is about 11-12 foot away from the TV. (60")
And there's about 6' space between the back of my sofa and the rear wall.
my plan is to get the following for a 5.1 setup

Onkyo-TX-SR806
Front -Klipsch RB 61
Center -Klipsch RC 52
Surround -Klipsch RS 42 (would be mounted on wall to the left and right of the sofa.)
Sub -Klipsch RW-10D

Would this setup be sufficient for the size of the room? Any suggestion/advice?
I'm not 100% fixed on the setup, so if you think any of the speakers wouldn't be a good match with the receivers or w/ the other speakers, please let me know.

Thanks in advance