Ty, Ryan!
I draw on an Intuos3 A5 wide, you don't need anything bigger than that (unless you have specific tasks to do). For the average amateur/semi-professional it's more than enough. However, if I were to buy a new one I'd go for the new Intous4, since it has many more pressure points. The one that I have retails for about 300 euro, which is SO worth every öre. A girl I used to know had a Intuos3, check out her amazing and world reknowned artwork at furiae.com.
Regards
Emil