Editing digitalized books / options?

Hello,

I am digitalizing all my books with a document-scanner. After the scanning they take usually quite a bit of storage. so

I try to use the acrobat XI function "optimize document". That cuts the seize in half.

There are several optioin-possilitiies (optimization-options and filter-options). I have been trying around with them, but

still have not found the optimum. Sometimes, the cover looks too blurry, even, when I chose the high-quality-option.

I wonder, what options professionals use for optimizing pdf-books. Can anybody recommend his options?

Thank you,

Marlon