I personally need a maximum of 2 screens for working, 1 screen for social networking, 1 screen for procrastination and from time to time the 5th screen would do nicely for porn.

I seriously would not know what to do with the 6th. I can't use it for social networking or procrastination as I waste enough time already, and 2 screens for porn is just creepy. I mean everyone has their needs, but 2 screens is beyond need.

That 6th monitor is going to be creepy, no one will know what to do with it. It's just going to be blank and staring at you, making you feel shameful that you can't give it a dedicated task it can call its own!