Samsung.
Plasma's has a better picture. Lcd's have a longer life.
I always do one of both. I have a 52 inch plasma and a 40 LCD both Samsunng. I sold my 50 inch vizio for 600.
Vizio is a TV that you buy if price is an issue as they have a tendency to be low quality high definition. I've owned 8 HDTV (2 Samsong's, 2 vizio's 1 LCD and 1 plasma, an Hitachi plasma, an Sony and dell LCD and another no name from walmart that I don't even remember the name) so I have a little experience. Vizio is the best of the cheap HDTV and don't even think of buying one from from a company that you have never heard of