Mx700 is the best mouse I have ever used, but I do forget to put it on charge sometimes and have to scramble for my camera's batteries
I also use the keyboard, WASD (for more keys), but a mate of mine uses a Nostromo speedpad and swears by it. I might get one cos it looks like it could be useful sometimes, not sure if my Saitek X45 throttle would do the same job though.