The Asus, the LG and the AOC have all the same panel: LG. The Acer has most likely a different one, so I can't say how it is. I have the AOC and I'm very pleased with it. The only downside is the non-all-over-consistent illumination, that means you can see the LED spots at some edges, but it's visible only when the screen is completely black, so I barely notice it. According to some reviews, the LG has the best screen, so if you don't mind to spend a bit more, go with it. If you're looking for the best price-performance ratio, go with the AOC. I wouldn't go with the ASUS, since it's more expensive than the LG, but I've read its screen is a bit worse than LG's, I guess it's on par with the AOC.