Wacom Intuos 3 or Intuos 4
Either of these editions are fine, the best sizes would be 4"x6" or 6"x9" (or sizes similar like 6"x8").
https://www.studentdiscounts.com.au/wacom.html?p=1 have great prices, if you want to purchase from here and need a student number, contact Mel and she will give you hers.
Intuos3
Intuos4