Here at Java Advisor we believe the grind is as important as the bean! We believe that an electric burr grinder offers the best functionality, as well as performance. If you are looking to save some money then a manual burr grinder performs well, but it takes a little longer to grind your beans. Personally, I have gotten satisfaction out of using a manual burr grinder as it changes up the coffee brewing routine and gave me more appreciation of the cup I was about to enjoy.
Regular blade coffee grinders will get the job done but can affect the flavor of your coffee due to the heat created in the grinding process. Blade coffee grinders also require you to eyeball the grind of your coffee, which can be a pain if you are looking for something specific like an espresso grind or a more coarse grind for a french press.