I am in my 3rd semester in nursing and I was wondering if I should get a PDA. What PDA do you nurses, students, or medical professionals recommend? I want a PDA that:

1) has long battery life (how long last)
2) durable
3) big storage
4) accesories like (wifi, calculator, alarm, etc)

Also, what programs would you recommend that I will find very valuable? (for meds lookup, iv compatibility, labs, s/s, etc?) thanks =)