Do a little browsing in this and the LCD forum. Notice how many really long multi-page threads there are with third-tier mfgs. models in the title that originated 3 years or so ago--Westinghouse, Haier, Viewsonic, etc.
Go to the first pages of these threads and they're full of glowing reveiws from people very happy that they got such a great deal on a tv.
Then go to the last few pages to find that an alarming number of these sets are malfunctionning, most with the same problem, and in many cases with no hope of repair.
Don't get me wrong, there is a place in the market for these tvs--I call it the "dorm room" tv, a set whose buyer might be a student who isn't super picky about picture quality and doesn't intend to keep it for an extended period of time, or for a buyer who wants a set for a vacation home or guest room that isn't going to be used much.
They can be a disappointment to the buyer who wants a set to last for the long term.