Best viewing angles are attained by IPS panel technology.  These are also the most expensive.  Most 19" non-widescreen LCDs are actually 5:4. but that's close to 4:3, and you can letterbox a little if you want, and many are IPS panels.  You can "barn door" aka "pillabar" a widescreen LCD to only use a 4:3 area.  For PC signal sources, you may need to do so in software.