I'm quite happy with single monitors.
In the form of Apple Cinema Display 30 inch !
mixture: I was trying to think of some clever rejoinder - along the lines of "It's not how big it is - it's how you use it!" but on this occasion will refrain ... And leave you with this thought: My primary display is a laptop, so when a power outage happens along (unhappily a fairly frequent event in this part of the world), my UPS kicks in, giving me time to pull all the open windows off the big screen back to my laptop, and I can then switch off the big screen and continue working for another three to five hours.
Suspect your shiny Apple Cinema display would kill my modest 750VA UPS in a matter of minutes. But of course, most likely you are not so serially and seriously inconvenienced by your power supplier's inability to supply power!
: ok: