I think the Orb's are fantastic..
The speakers are about the size of a small grapefruit. to my humble ears and for that matter those of friends and neighbors, they sound terrific. If you read the review posted on this site it is accurate to my experience.
I am using paired speakers (called Mod 2) for the center and sides and single speakers (called Mod 1) for the presence and rears. The system is powered by a Yamaha 2600. I used Blue Jean Cables.
My system was designed from reading reviews and posts on this site.
The installation was in a family room 13X26. The house has an open floor plan. It is a large space. I placed the speakers as best I could and relied on YPAO (Automatic Speaker Leveling "Gizmo") to balance the sound.
I was doing a remodel, speaker size was issue. Obviously, I am not a home theater expert. But this answer is so simple, and it sounds so cool. I heard beautiful music in less than an hour
Pinn