A search turned up this thread but it's a bit old, and never really came to a hard conclusion. I have a customer interested in having 6 displays for the least money possible. Strictly for work, but potentially quite big monitors, so I'm loathe to recommend using VGA on any of them. What would be the cheapest option for 6 digital display outputs? The old thread suggested USB external display adapters. I'm reluctant to do that because (a) I don't know how good they are, (b) it takes up several USB ports and (c) it means having a bunch of adapters dangling around the back of the case and doesn't look very good.