As for prices: my searches show Adobe Acrobat at $175-$220, depending on
version, and Adobe Acrobat Capture at $550, and - shockingly -
20,000 page "upgrade packs" to extend the functionality of
Capture, at $375. That's right - it's limited and pay-as-you-go.
I don't know the page limit for the initial version, and 20K pages
is a lot of scanning.
What about Adobe Circulate? From the product description at
<http://www.adobe.com/prodindex/circulate/main.html>, it seems more
appropriate to the task at hand, keeping the digital image as well
as merging the OCR searchable text.
- John