I am considering purchasing a scanner for the following:-
100 page document (primarily text) which I need to edit for use with another document.

In the future I may have need to scan 35mm negatives, but at this stage not the high priority.
G4, 400 Powerbook, running System 10.2.3. I have Adobe Acrobat 5.05.

Can someone please advise me of the most (cost) efficient solution in terms of scanner and software?

TIA
Mike Anderson