The Acer 42HQL has a maximum contrast ratio of 100000000:1. That's over twenty times the contrast ratio of a 5000000:1 flatpanel monitor, which is the most common contrast ratio.
A 100000000:1 dynamic contrast ratio is actually the best contrast ratio amongst all comparable spec PC displays that were launched more than a year ago.
A Mega Contrast dynamic contrast ratio is the worst contrast ratio amongst comparable types of PC screen.
We think you might also be interested in some of the alternative LCD screens that have a 100000000:1 dynamic contrast ratio currently available including the K212HQL ($114.00), or the 12HQLB both from Acer which is cheaper; or the Acer K242HQL ($102.99) which has a better Rating.