The highest contrast ratio of the BDM3275UP is 50000000:1. That's over ten times the contrast ratio of a 5000000:1 flatpanel monitor, which is the most frequently found contrast ratio. The contrast ratio of all similar spec LCD screens that are a comparable age to the BDM3275UP ranges from Mega Contrast to 100000000:1.
It may also be worth considering one of the other PC screens that have a 50000000:1 dynamic contrast ratio currently available including because of it's better review score, the Philips BDM3275 (£619.99).
PC displays with a higher contrast ratio that might be worth considering include the Asus PB279 (£572.75) (100000000:1) which is also higher rated.