The highest contrast ratio of the BDM4065 is 50000000:1. That's over ten times the contrast ratio of a 5000000:1 PC screen, which is the most frequently found contrast ratio. The contrast ratio of all PC screens that came out more than a year ago ranges from Mega Contrast to 100000000:1.
It may also be worth considering one of the alternative LCD screens that have a 50000000:1 dynamic contrast ratio currently available including because of it's better review score, the BDM3270, the BDM3275UP, or the BDM3275 all from Philips.
If the contrast ratio of this medium monitor is not high enough for you then you might also want to look at the Acer Predator Z35 ($707.99) (100000000:1) which is also cheaper.