I spent many hours looking through all the various options and discovered that a lot of companies use screens made in the same factory and are just rebranded.
Many of the cheaper screens are not good quality and have a poor viewing angle.
My final choice was for a 17" LG flatron 782 which was a good compromise between cost and quality. I am very pleased with it but would not advise using a flat screen for heavy gaming as there tends to be some ghosting when fast movement occurs.
If you want good prices try
www.action.com or
www.pricerunner.com