My coach has a 27" CRT TV above the dash, sitting is a cabinet.If I purchase a 28" HDTV, it will fit inside the cabinet, with room to spare. If I purchase a 32" HDTV, it will fit flush on the outside,...
I have the subwoofer for my sound system mounted inside the old CRT cabinet. That takes up close to half of it. The 2x4 used as the stud to hold the articulated mount takes up some with the rest being used for important file folders (including registration). Not too much unused space.