I think it is imperative for a quality gaming rig. Gaming is an expierence, its not a picture meant to look pretty, why spend the money for a good picture when you good spend a little extra for a 'good expierence', know what I'm saying?
You will notice a difference even with an upgrade as simple as this....
http://www.newegg.com/Product/Produc...82E16829102002
They are very easy to install, click it in place and pop in the cd and d/l the software.