I used a Magnavox 19 inch wide screen lcd/dvd with my 2004 3124 KS. A 20 inch should be ok. Kinda depends if the speakers are on the side of the screen or below.
The bedroom has a tv stand and my opinion a large tv I would not trust on the shelf.
My solution was to purchase a pinnacle usb tv tuner for my laptop that had a 15 inch screen and I used that for the bedroom. The tuner picks up both digital and analog broadcast. Also, the software makes my laptop a dvr if I want to record something on the hd while I am out playing.
This is the optimum setup for me.
Spouse purchased a cellular router so now both of us can surf with her Cingular data card.
Guess we still want the toys even when we are away from home.
mike