Yes RTF does look good on the SONY (supported natively as well). The Sony Connect Software also does a good job converting Word Docs to RTF files. The limitation RTF files have is that they don't support images or links.
RTF is essentially well formated text.
What I have resorted to for my own documents is to use OpenOffice as an HTML editor and use calibe to turn it to LRF. OpenOffice is an excellent word process as well as an HTML editor.
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