I just got a 42" LCD (1920x1080 res) and been pretty happy flying around with it. Stepped up to that from a 24" LCD. Then I started looking at multi-screen set-ups like this ( he is using 4 computers to run 10 screens...also need a copy of FSX on each comp...)

and now I am wondering if going with 3 smaller screens using
WIDEVIEW would have been better. For the price I paid for one 42" LCD I could have bought 2 more DELL 2405/7's and had three screens. Would be nice to go with 3x 42" screens, but at $1400ish per screen and me not being made out of money, probably not a good idea to stretch myself out like that for a video game.
Would need to have two computers to do it, one being the gaming computer that actually runs the game and the second one just relaying the video info from the first one via a lan cable, so the second comp could be a pretty mediocre build. I didn't read too much further cause I thought I'd go crazy and order two more 24" screens or God forbid, two more 42" screens and actually do it lol.
Currently just running a 17" screen to the side of my main screen for GPS and radios.