it all depends on the kind of cabinet , the viewing angle ,panel size, hori or verti orientation or if its an 1 or 2 p cabinet. some may do fine with a 13 inch , others with 20/21 or a 25 inch screen . i think there is no way to build a satisfying table cabinet around a 28,29 or 33 inch screen . in the early days cab builders usually used 13 inch because the electric took much of the inside room and bigger screens were expensive. in the present with all the cheap micro comp stuff i would prefer something around 20 inch . make sure the tube fits in . a 25 inch is nearly 4 inch more in depth than a 13 inch tube. i had build a 25 inch vertikal cocktail cab some time ago , but it took a long time to optimize the ergonomics . bigger isnt always better , sometimes it ends in desaster.