The 24MB35PH-B has a maximum contrast ratio of 50000000:1. That's over ten times the contrast ratio of the most frequently found dynamic contrast ratio of 5000000:1. Across all PC displays of a comparable type and age to the 24MB35PH-B the contrast ratio ranges from Mega Contrast to 100000000:1.
It may also be worth also looking at one of the other flatpanel monitors that have a 50000000:1 dynamic contrast ratio currently available including the BDM3275UP (£656.09), or the BDM3270QP (£383.14) both from Philips or the Viewsonic VX2363SMHL (£97.00) which has a better Rating.
If the contrast ratio of this PC display is not high enough for you then you might also want to consider the Asus VX239H (£114.97) (80000000:1) which is also higher rated.