Search around for a Sony Ericsson P910i. it reads pdfs word excel and powerpoint documents, its also a phone and it has handwriting recognition in there too. The battery life is good and you wouldn't have to carry 2 gizmos around.
I have a palmT/X and it crashes far more than anything with the symbian operating system.
Although its old technology and you may have to search ebay (grrrr)
Or maybe a phone store maybe able to get you a 2nd usermn one.