The highest contrast ratio of the HE195ANB is 40000000:1. That's over two times the contrast ratio of a 20000000:1 PC monitor, which is the most frequently found contrast ratio. Across all LCD screens of a comparable age and spec to the HE195ANB the worst contrast ratio is Mega Contrast and the best is 100000000:1.
There are a number of alternative flatpanel monitors that have a 40000000:1 dynamic contrast ratio currently available which you might want to consider including cheaper PC screens such as the Hanns.G HE195 (£55.34).
If you want a PC screen with a higher contrast ratio then you might also want to look at the Asus VS197 (£49.99) (50000000:1 and higher rated).