you get used to the mouse, even if it isnt as accurate as it could be, (unless if the cursor doesnt move when you are moving the mouse - all the new dell pc's at my school have this problem. But I havent had a problem with opticle ones doing this.) so it is, what ever one that is comfortable.
I have a NEC opticle one, that is now a few years old, I think about 4 years.