See you've bought the screen already. Was going to suggest to you test some gradients, and line patterns on it before you bought it. Most LCD screens are sharp, but a few of them handle colors badly. With a basic gradient you would see visible banding on the screen. This becomes kind of important when working a lot with graphics. :P
Many of the cheap screens (as well as the really fast ones) use 6-bit panels instead of proper 8-bit ones. One giveaway is if it's marketed as having 16.2 million colors instead of 16.7. Sounds insignificant, but it's just artificially increased through hardware dithering, and is of a noticable lower quality.