I currently am rocking only 2 monitors. Here's my setup. (Somebody please compliment my cable management). Notice the 2 monitors? I use both of them. In fact, I could use a third. Monitors are like hands. You can probably get by just fine with a single hand for most activities, but once you get 2, you can never go back. read more
Some gamers like to have two monitors so that one can be running a game full-screen, while the other can have things like external chat windows to communicate with other players (or just with people in general). read more
For gaming triple monitor setup can be really hard. I would recommend getting a single big monitor that you would like and any old monitor that you have for the other tasks. I do this myself except i have 4 monitors. 1 for gaming the other 3 for other tasks. read more