LCD TV's are relatively "easy" to make now that you could trust just about any manufacturer. If name brand is an important issue however, you could stick with the big companies: Sony, Samsung, Panasonic, etc.
Sony makes one of the best 20 inch LCD TVs around. You can never go wrong with the company Sony because they always ensure quality with their TVs and thier service. I think that Sony is the best company when it comes to TVs or any other electronic device as well.
The sharp company i guess makes good 20 inch LCD TV's because they have been in the business for along time. They already had experiences in developing new appliances aiming to provide good quality services to their customers.