I'm finally able to get an Intuos 3 but am having a hard time deciding on the size. I was originally leaning toward the Intuos 3 6x8 but now I'm torn between the 6x8 and the 6x11 widescreen. I'm an art student and working on a G4 Powerbook (eventually will upgrade to the Macbook pros). What would be an overall better purchase, the 6x8 or 6x11?