Thanks for your answer, teemac - although it just makes the decision more difficult
(I was on the brink of just getting the v3 and stop caring about CPU speed).
I read contradicting statements about the zoom function in the available firmware of the v3+, so could you please tell me if there is a zoom & pan function for pdf or djvu at all or if it's still just three zoom levels with fixed positions of the viewed area?
To be more specific: Would it be possible to read a file like, eg
this one (with or without conversion to djvu) comfortably using the current firmware?