The Asus VB178T has a maximum contrast ratio of 50000000:1. That's over two times the contrast ratio of a 20000000:1 PC display, which is the most frequently found contrast ratio. PC displays of this age and spec dynamic contrast ratios range from Mega Contrast to 100000000:1.
We think you might also be interested in some of the other LCD screens that have a 50000000:1 dynamic contrast ratio currently available including the Asus VS208 (£97.04) which is cheaper; or the VE198 (£71.99), or the VW199 both from Asus which has a better Rating.
PC screens with a higher contrast ratio that might also be worth looking at include the Hanns.G HX194 (£92.96) (80000000:1 and cheaper); or the Asus VK207 (£124.99) (80000000:1 and higher rated), or the Acer 176L (£89.65) (100000000:1 and higher rated).