First off, you have to decide if you are willing to test your luck with a korean monitor that is built using A- stock panels from companies like LG. These tend to be
much cheaper, but come with risks of having dead pixels and no warranties. You get what you pay for and that is final. Many people will say that the low cost of these monitors (around $300) is enough to outweigh any possible defects, but that is for you to decide on your own. The most well known Korean monitor is the catleap. Another is the Shimian, and
here is a review for it
If you are not willing to buy a korean monitor off of ebay, a good option to consider is the
Nixeus monitor. It has excellent reviews, but costs just over $500. If price is not that big of an issue, I would personally go with the reliability of something that is shipped from the US from a well-known company that has a warranty.