Vestel is a Turkish TV manufacturer who supply sets badged according to the customer order. Their quality is world renowned, which is why I will only sell LG and Samsung. Toshiba and Panasonic have no connection with these sets, except for the branding.
Just out of curiosity can you please explain exactly what goes wrong with them. I can see you despise them but a description of the problems you have encountered would be more interesting and informative than just slating them.