I wall mounted a 58 inch Panasonic plasma, 140 pounds using the followng mount. U.S. mail order price is about $400, but in my opinion worth every penny.
http://www.sanus.com/ca/en/products/...n-mount/VMDD26
I see that it only goes up to 63 inches.
Anyways in my case, installation was easy. You just need to be very confident that you can find the center of the studs in the wall. I used a studfinder tool and then, to be certain, also tapped in some small nails to really find the left and right edges of the stud.
The best feature of this mount is that the TV can pull away from the wall up to 2 feet and swivel left and right by 45 degrees.
Good luck.