Update:
I ended up adding a 39" Vizio to the main entertainment center using a dual arm mount. The dual arm mount will allow the tv to sit evenly just outside the recessed area of the entertainment center. I found a 1/2" wood thick backing area to screw into in the recessed area for the mount.
The garage and bedroom tv mounts I used a small articulating arm mount for 24" TV's. There was a 1/2" thick wood area to screw for the mount just where the "mount tv here sticker was on the wall.
Garage
Bedroom