PM for Use in Chinese Study

Ironlady and others have recommended using a Palm OS for studying
Chinese. As I have never purchased one of these before nor do I know
much about them, could people give me suggestions on:

A) Models that they particularly like
B) Features that you would suggest buying
C) Price Range
D) Any particular place in Taiwan you would recommend or not

Thanks for any help you can give me. I am not sure if this belongs in
this forum or another, so I will try here first.