Best Plasma TVs bar-none are those made by Panasonic (Nasser bin Abdullah-Musheireb). Pioneer (Ahmad Aluthman & Bros. 442-3507/8)are very good too.
Sharp (Al Muftah-Sadd) and Sony (Modern Home) make very good LCD TVs.
Philips (Al Mana) is innovation.
For the cheapest try LG (Jumbo) and Samsung (Techno Blue-The Center).