I just purchased a pa248q yesterday, there is some backlight bleeding at the bottom right and left edge, but that is only in a dark room with a black screen, other than that it is a nice upgrade from a 20" apple display. The 20" was still pretty decent, but I do notice that the image is crisper and colors are more vibrant on the asus. Image distortion is not visible even at wide viewing angles, the apple display was pretty good but the asus is much better. Response times seem better compared to the apple but I have not done actual testing other than my initial perception compared to the apple display. other sites have done in depth analysis on response times and the asus always comes away with high marks.
I'm very happy with my puchase.