I have an Wacom Intuos 2 4x6 and I find the tablet a tad small and would love a bigger one.

I can buy a Bamboo in different  sizes at a local store which are cheaper than the Intuos, so I was wondering why they were so much cheaper and a bit of research turns out that the pressure sensitivity on the Bamboo is not the same as the more expensive series.

So if you want to do Painting and Brush simulations stay away from Bamboo, but if you are using Bamboo for simple drawing stuff or using it for 3D its probably the more economical way.