We already took a fresh look at the Vizio Tablet due this summer, but the company's main business is HDTVs and there it's on top of US LCD sales again, with more than 20 percent of the market in Q1. Of the top five selling TVs in Q1, four are Vizios priced at $698 or less, while the other is a $1,699 MSRP Samsung LCD. Vizio launched its lower end E3D line earlier this year, the next seri