The Asus VW24 has a maximum contrast ratio of 100000000:1. That's over five times the contrast ratio of the most common dynamic contrast ratio of 20000000:1.
This PC monitor's contrast ratio (100000000:1) is in fact the best contrast ratio amongst all medium monitors that have been available for a similar time to the VW24.
The worst contrast ratio amongst similar types of PC monitor is Mega Contrast.
There are a number of other PC monitors that have a 100000000:1 dynamic contrast ratio currently available that you might also want to look at including the Acer B236HL ($457.13) which has a better Rating; or the Acer B243 ($428.92) which is cheaper.