Excellent advice Tony and pitrak, thank you!

I think you've both convinced me that a Medium should be fine.

Saves AU$150, too :)

And takes up less desk space.

I just always figured that it would be better to have a larger one for drawing, as with more space to have to move the pen for the same distance of the cursor would mean it would be more accurate (finer control).

But you all seem to say that a Medium is fine, so that sounds good :)