The highest contrast ratio of the Lenovo T2324p is 3000000:1. That's 40% less contrast ratio than the most common dynamic contrast ratio of 5000000:1. Across all PC displays of this age and type the best contrast ratio is 100000000:1 and the worst is Mega Contrast.
We compared all the other flatpanel monitors that have a 3000000:1 dynamic contrast ratio to this PC monitor and we think because of it's better review score, the HP ProDisplay P221 is also worth considering.
PC displays with a higher contrast ratio that might also be worth looking at include the 22MP47 (5000000:1), or the 23MP47 ($98.99) (5000000:1) both from LG which is also cheaper.