The benefits of going multi-monitor are many and it's not as expensive as you might think. When I went LCD shopping, I discovered that for the cost of one 21" LCD you can buy two or three 17" LCD monitors. Most 21" LCDs run at a native resolution of 1600x1200 while a 17" run at 1280x1024. By combining two 17" LCD monitors in a dual setup you can have a HUGE 2560x1024 desktop!



Link: The Tech Zone