nothing special, just same resolution. if they do not have a DP (displayport) input you will need an adapter, which is another $100. (most monitors DO NOT have it)
I would get the tallest resolution possible - as 3 monitors side by side gets you 5k pixels or more horizontally , but whatever each monitor is vertically is all you have... so get 1200 vertical if it's feasible.
also, the thinner the side bezels are the better.