Monitor is the face of your PC. Believe me. You will always look at your monitor than for anything lese. So always go for the biggest and the best till you afford.
The theme for the monitor is BADA HAI TO BEHTAR HAI.
But of course you have to keep some more things in mind after the screen size.
1) Buy atleast a 17 monitor. They will cost you around 6500 bucks but worth every penny.
2) Buy a monitor based on its refresh rate i.e. normal is around 1280*1024 @ 75Hz. Your monitor should support atleast 1280*1024@75Hz. Obviously the more is merrier.
3) Always buy a monitor from a very good company like Samsung or LG or if you can afford go for Sony or View Sonic.
4) Check your table space you can give for large monitor before buying a huge one.
5) There is not much difference between Flat Panel or normal monitors only the screen is flat. I have a Flatron but I dont have any benefit associated with its flat tube till now.
6) Dont give a damn for the side-speakers which come attached with some monitors. It is not a good feature as you have to go for the one attached with monitor. You cant do anything about the sub-woofers as generally they are not came attached with Monitors. Instead, You can buy a seperate set of good sub woofers from Creative Inspire series in lieu of the attached speakers and they will give you sound like never before.
7) Make sure whenever you will setup your computer you will set it up at atleast 75Hz or more refresh rate. It can be done through the Display properties on the Conrol Panel.
Have a nice viewing.;)
Keep Smiling.