was out looking for 19 to 21 inch flat screen for kitchen/dining room wall the weekend. Could not find one that you could put on a swivel bracket, all tvs that size was like a picture bracket, unable to swivel. have to keep the cook happy!
I bought a 20 inch Philips widescreen last month and a vogel bracket that swivels.
If you use Vogels website you can select a TV and they will then list all compatible brackets. Granted Vogel are more expensive than most but i found it excellent.