I can only say: buy it!

I have an old Wacom Graphire for my earn-a-living desk I use two times a day and an Intuos pen and touch for Poser, Paintshop and everything else. I use them whereever I can in lieu of a mouse. The pen is a real play-thing for me. Helps a lot to prevent carpal syndrom, at least for me it helped to prevent progress.

The M size is perfect for what you want. Smaller just is too small. Larger is just not practicble. 

The Bamboo tablet line here in the Netherlands at least is being phased out. They just have the Bamboo pad. I had a Bamboo Fun&Touch but last September spilled tea over it and it sadly died. Bought the Intuos M, now at Euro 170.- retail price, and love it.