Wacom is the only way to go, you definitely wont regret it, the only real decision is which size. Dont get it too large because it wont fit on your desk probably and it wont be to easy to use, you'll end up redoing the active surface area, like I did with my 12"x18", the 6"x8" or the 9" are the best I think in size. But its great quality hardware and after a while it just becomes second nature.
