20 inch 4:3 640x480 TV's have the second worst image quality of all LCD's just after Airplane seat screens.
Contrast is 1:50 or so, and viewing angles are 2 degrees.
Next, composite input looks like it goes through a diarrhoea filter. Colors are getting brownish and unsaturated.
Pick the nice 1600x1200 IPS and PVA ones. And blocky LCD graphics kick CRT blurry phosphor crap ass IMO.