Digital BW, The Print

I have a friend/photographer who is having real back difficulties when
working hours at a time when retouching her work for neurotic
corporate clients on a short time schedule.

She wants to buy a Wacom or similar pressure sensitve pen and tablet.
Since I don't use one I'm not sure what is the best available now for
the money. From the days when I did use one I remember it makes sense
to buy as large of one as possible. For me anything smaller than 11x14
is not worth the trouble. Do you guys use the newer ones? What is out
there? Where does she shop online?

John