If you think about Vizio 32 inches because it is cheap, I strongly advise against that. Spend little more and get a reputable brand. The reason why? I did that, and hated it. Returned it back to the store. Bought another TV back to the house. That was quite hassle.
Samsung SDS, to be specific, provides panels to Samsung electronics and other companies like Sony. Samsung sometimes use panels from taiwanese companies, especially when that's cheaper than their own panel, and the TV is not their top of the line model. All other companies do the same. So it is not unusual for you to find Taiwanese panel in samsung TV or monitor especially when yours is cheap model. Also, it is not unusual to find Samsung panels in Sony TV.
The bottom line is, Samsung knows how to make a quality panel. Sony knows how to tune it up. So TV products from both companies are not bad at all. Samsung tend to be more natural, Sony tend to be more bright.
Another good alternative would be LG.
LG, to be specific... LG-philips electonics owned by LG, is the other major panel maker. LG provides their panels to... you guessed it... philips. LG is in electonic business as much as samsung is in, so LG knew how to make a good TV too.