Which Wacom tablet would suit my needs, Intuos vs. Bamboo?

I am not a graphic design student but digital painiting intrigues me quite a lot. I have been watching online lessons of it and have finally decided to buy a pen tablet. I want to pursue digital painiting as a hobby.

Budget is not a constraint for me (owing to the hige price difference between Bamboo and Intuous) but I want to use the money effectively.

Which tablet would you suggest me to buy?