What is the best choice a PDA or e-pc for my situation?

i just got a promotion at work to health and safety and I now have a lot of paper work to do and i was wondering if a pda or a eeepc or e-pc which would be the best way to go and which brand I don't want to spend to much but i want it to be on windows and to have word with spell check and excel and the rest of the office stuff on it?