For the bedroom TV I just installed a 19" with built in DVD player.
For the living room since the cut out is an exact fit with little inch to inch and a half on the left side clearance.
I was thinking about one of these. This is a spring time project for myself.
Then I can fit a larger TV and rotate it out of the way when traveling.
This will also open up the cabinet behind it for other storage.
To save yourself some trouble Have a look here.