From my experience, country of manufacture is often a QC telling point. Screens from Korea tend to be better, screens from Japan tend to be the best, screens from Mexico...
But that's often a price point decision. I bought a big screen Panasonic plasma some years ago. The S10, G10 and G15 were identical specs except for the origin and built-in apps. S10 was Mexico, G10 was Korea, G15 Japan. $1k difference in price between the S10 and G15, but the picture reflected the price difference, not the inclusion of easy access Netflix and Vudu.
More often than not, you get what you pay for, but there is a big difference between a quality panel and a budget panel and it's very rare to get a quality panel in a budget monitor. Hardware Unboxed has a lot of in-depth monitor reviews explaining the differences.