Going through the various forms, display port adaptors are a hit and mis affair for people. Works with some set ups and not with others. Others seem to get away with an apparently non active adaptor. The only guaranteed way ensure functionality is to get at least 1 monitor with a Displayport.
I have 3 Dell 2407WFP and am using TH2Go. When it time comes for a graphic card upgrade, if Displayport is still a requirement I intend on selling one and geting a 2408WFP.
And agreed, bezels are not an issue when playing. As a third person observing someone else or watching a video of a triple screen set up, I can understand why people who haven't tried it are concerned with the bezels.