The higher the dpi the least amount of ' hand movement' you need to get the mouse pointer to the same location. That being said any of the Razor mice line are great (I have one) Logitech make great mice also. I guess it all depends on which one you want... there are literally hundreds if not thousands.
I used to have a track ball mouse that I really liked a lot but I have not seen them in awhile. It was easy for me to spin around when playing FPS games to attack a player behind me. I always got 'called out' as a hacker because I could move so fluidly. I don't play FPS games much anymore my reflexes have gone down hill as I got older .... LOL