Vizio has a better service record...if it is not much more than a comparable Emerson, go for it!
When I look at Vizeo it seems to be the best picture in the lower price range, I like LG in the mid price range and Sony the higher price range. I would go see them and check out witch picture you like the best.
When I was looking for a TV, I read reviews on an Emerson. They went very pretty. Go for Vizio .