I have both an Acer AL2216W and an AL2223W on my desk, the 2216 is hooked to a MacMini and the 2223 is hooked to my MacBook Pro. Both are fine displays and seem to have the same level of contrast and brightness. As someone else mentioned, you really need to look at them running to judge things. Now, that being said, the 2223 definitely has "bright corners/sides" issues with the back lighting. I check this by opening firefox and creating a new tab with no web page and maximizing to fill the screen. It is not a huge issue, but I have seen other displays with definite uneven back lighting that would be a problem for daily use.