The Parhellia would work, but I think as a rule very few games actually support playing accross all three monitors. I do know that flight sims do work with several monitors. I do recall (I think) seeing Quake III forced to run accross 3 monitors too, so I suppose it is possible. Though I also suppose most games need to be hacked to support the "unstandard" resolution of 3 displays. And yeah, a sniper-type game with two views (normal/zoomed) would be a serious hack and would remove the challenge of the game. But that's just me. I had hacks/cheats/mods that help you hack/cheat. (mods to make the game look different, but play the same are a-okay!)
\Dan