I know several people in Seattle who own Vizio HDTV's and they love them. I will contact them and see if they will post there reviews / thoughts for you.
In the mean time, I have seen the Vizio line on display and I'm not sure which impressed me more,the quality of the picture or the price.
I think Vizio may be taking the same approach as Sunfire. Their goal being to provide the best quality available at a price point more people can afford.
More often than not, you can make more selling more products at less money than you do selling a few products at a very high price.
For the record - I don't work for AR or for Vizio.