I have a 29" tv that rotates and a pedestal design. I love the rotation, because it makes vertical games look great.
You also need to consider that when the TV is in vertical position, that the edge of the tv clears the top of the pedestal (so that the pedestal doens't cover up part of the screen). You can also have the pedestal so that its not flush with the wall and not worry about clearance.
The tv support that I'm using sticks out 3 inches from the wall and a total of 6 inches with the tv included.
