Which size Wacom should i buy?

[Cergorach]

I just got my Wacom 9"x12", i find the board itself un expectedly light, it's perfect for working from the lap, still need to install the software and test run it in photoshop.

 

[shadowlight]

Just to add my 2 cents, I've had a 3x4 Graphire for about 4 years (yes, the original one when it first came out) and I use it mainly for Photoshop cartography and Photoshop sketching. I've really liked the size and functionality. I sometimes wish it were a little larger for drawing on my lap, but I generally prefer to draw at a desk anyway...