referring to this post, i have a question.How to Turn non existent posts into 404 errors
What should be used? a custom 404 page which has the same look as the forum (as is with wordpress) or 301 redirect to home page for non existent posts?
The reason i am asking this is, that i am in a move to delete a lot of posts ( about 2500 which are about 5% of total ). But many of these posts have individual page rank and are getting traffic from google + google images. Should i redirect visitors to home page or may be some page which contains the list of topics or what?