You can complain about the Vizio's but unfortunately people will still buy them.
We were forced to install 15 50" Vizio's by a customer. After Calibrating the units they looked very good with an HD input.
I can tell you that of the 15 units 7 looked ok out of the box, 1 was terrible, and the others needed calibration.
The missing link to making this TV provide a better than average picture is calibration which every customer seems to overlook or does not understand. Even with a Pioneer Elite there is a substantial improvement to be gained with proper calibration but this is not always explained to the customer. Getting Vizio customers to spend the extra $300 is another challenge

I think the big issue here is this. Just as we try to explain why a customer should spend the extra $$ for a better TV, integration, and overall experience.There are customers who will go out of there way to justify their savings and don't mind dealing with multiple remotes and a picture that is OK. Then they want guys like us to answer all the questions they did not get answered from their costco salesperson.

In most cases if you have to justify the difference between a $1K TV and a $3K TV or higher it is time to move on.