We had a Surveyor 186 that had a very deep space like that. We put a small, free-standing flat-screen in there, and for travel we secured it by pushing it to the back, putting a throw pillow in front of it, held in place by one of those spring-loaded refrigerator retining bars.
We didn't have a door on ours, but I think that's a very good idea.
2013 Surveyor SP220
2010 Silverado LT 5.3 V8
The world is a great book, of which those who never stir from home
read only a page. - St. Augustine