I'm not a fan of LCD rear projection. They aren't up to par with DLP projection units. They tend to have pronounced screen door effect and poor blacks that are more like dark blue. They have improved but there are better deals out there. See
THIS article at Audioholics for a complete explanation of all the display technologies.
With that said, I can't recommend a Samsung DLP. I used to be under the impression that Samsung made great quality stuff but now that I work as an A/V installer for a store that is also a service center for just about all brands my opinion has changed. Samsung is by far the most repair-prone brand for DLP TVs. The repair rate is nearly 50%. That is rediculously high. That is the reason we have not sold Samsung DLP sets for two years and we still bring in many of them from customers who bought them elsewhere. They have great picture quality but I can't recommend them. Samsung is not very easy to deal with from a dealer/service center standpoint either. I am not impressed with them.
My pick for DLP would be Mitsubishi. They have excellent picture quality and they are built like tanks. They are the most reliable rear projection TV we sell and service.
Sony SXRD sets produce very nice pictures and have been fairly reliable but the green blob issue is still a concern.
If you're looking at plasma displays I would look at Panasonic. They make some of the best lower cost plasmas out there and they are very well built. We have never taken a single Panasonic plasma in for repair. Again, Samsung is one to avoid. Samsung is the
only brand of plasma that we have ever had problems with. I can't comment on Vizio reliability but I have heard complaints about their customer service.
In the LCD arena I would have to say that Sharp tops my list. They make some of the nicest looking LCD displays I have ever seen. Their new D92U line is particularly impressive. It is definetely the best looking LCD I have seen to date.