As someone who just got his first 30", a Dell U3011 yesterday, a 30" for gaming experience vs a dinky 20" that I was on for years is flat out insane!!!!!
Also keep in mind that not all current, old or even new games will support multiple monitors where as a single 30", you have alot more options
Trying to play Team Fortress 2 last night for the first time on my 30" was a bit of a challenge, my eyes have so much more area to cover and look around that I have to readapt my playing style to the bigger screen, I can't imagine having 3 screens in front me and having to turn my head
Edited by 1ceTr0n - 8/13/11 at 1:26pm