My previous tablet was an ArtzII 6x8 which is probably the wacom youre using Klaus, and then I bought an Intuos 6x8 a couple or three years ago. Apart from the design of the pen (bigger) I didnt see much difference even though it apparently has more pressure levels. I upgraded because I needed USB to plug it into my laptop and the ArtzII is serial. Its now used by my younger daughter mostly for drawing/embellishing her digital photos in photoshop. Recently when demonstrating some photoshop method I used it again and Im thinking I preferred the smaller pen barrel to the newer bigger intuos one... also the whole tablet is smaller which makes it a bit more portable perhaps.
If youre after some new retail therapy, the new Canon A70 digital camera is more compelling Id suggest. 640x480 video. yeow.

Q