The Acer Z35 has an LCD display type which is better than most flatpanel monitors that are a similar age to it. Most latest medium monitors have an LED display type.
An LCD display type is in fact the worst display type across all latest similar spec LCD screens.
An LED display type is the best display type amongst similar types of PC monitor.
If the display type of this flatpanel monitor is not good enough for you then you might also want to look at the Samsung CF390 (£149.29) (LED and higher rated).