The highest contrast ratio of the MultiSync EA234 is 25000:1. That's 100% less contrast ratio than a 20000000:1 PC monitor, which is the most common contrast ratio. Comparable spec PC monitors that have been around for a similar time to the MultiSync EA234 dynamic contrast ratios range from Mega Contrast to 100000000:1.
There are a number of other PC screens that have a 25000:1 dynamic contrast ratio currently available which you might want to look at including the EA224WMi ($172.99), or the MultiSync EA274 ($749.00) both from NEC which has a better Rating.
LCD screens with a higher contrast ratio that might be worth looking at include the E2773HS (5000000:1), or the XB2483HSU ($491.83) (5000000:1) both from iiyama or the DELL U2412M ($226.58) (2000000:1) which also has a higher rating.