Seeking suggestion of a personal productivity device that meet the wants as detailed below?

I am looking for a personal productivity device specifically small in size (though it can be larger than a palm), dutiful battery duration, robust and strong, can be started and worked for intervals of 15 minutes too, withstand heavy duty travelling – train, nouns and bus. It should have a practical, usable the ivories, run office tools such as Outlook, word, XL, Acrobat, Web browser (work on commonly used files such as xls, doc, pdf, htm, ppt, mp3). Multimedia surplus - mainly organization use. Can connect with a USB adaptor for broadband, hold USB ports, easy synchronisation next to PC. Price should be not too sky high.

Seeking suggestion of a personal productivity device that meet the wants as detailed below?

I would recommend ultra portable tablet PC beside WinXP or Vista OS. If you run search contained by google you would find plenty but see link below to Amazon shopping probably there is something you close to.