Rewriting Large Articles Into Smaller Ones

I am looking for an easy semi-automated way to take large articles that are 700-4000 words in length and summarize/condense/rewrite them to much smaller articles (325 words) but maintaining unique content - fast. Looking to do 50-100 articles/day. Is a spinner my best choice? Which one?

power article rewriter this is where i downloaded it.

http://www.blackhatworld.com/blackhat-seo/member-downloads/34486-get-probably-best-article-rewriter.html

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You could always use the Microsoft Word "summarize" feature. I'm not sure as to the consistency that will result, but it's worth a try.