[netc]

I use 27"+20" at home and 24"+20" at work. I can say for sure having two monitors feels much better - I can dedicate one monitor to terminals and other for web and documentation. Having two also helps in quickly maximizing a documentation window in one monitor without obstructing the main working area (terminals) for me. I used these monitors in landscape mode and end up splitting the width of the screen into two or three terminals. 27" monitor felt huge at the beginning, but was pretty awesome once I figured out windows placement which works for me.