KitGuru tried the Acer Predator XB252Q 240Hz G-SYNC Monitor
A quote from the article:
If you?re serious about your games, and like to win as much as possible, every frame counts. But even if you have the fastest graphics card currently available, your monitor might not actually be able to display all the frames that are being delivered to it. This is where a top-end gaming monitor like the Acer Predator XB252Q comes in. It's specifically designed to get the best out of high frame-rate gaming.Acer Predator XB252Q 240Hz G-SYNC Monitor Review @ KitGuru