I increased the strength of the factory rotary board by mounting a large piece of 1/2 inch thick solid birch and then through bolted an extra heavy duty swivel and tilting mount with four 5/16 inch bolts, large fender washers and nylok nuts. The mount is rated for 120 lbs and since the TV is 18 lbs, just a bit over-kill. In fact, the mount weighs more than the TV
Oh yeah, forgot to mention, this is a 42 inch LG.
It pulls out quite a ways and swivels to face the dinette for daytime viewing and can easily be removed from the end of the arm by loosening two screws and removing two allen head bolts. That allows us to pivot the board around and remount the TV for bedroom viewing in about a minute. The entertainment center wasn't big enough for the PS3, plus it needs circulating air for cooling like a PC so I mounted it behind the entertainment center and ran HDMI up from below.