Add filter and pagination to CAML query

I'm developing a visual web part for Sharepoint 2010.

I would display all documents from a specific DL, but this DL contains more than 7000 items.

So I would like to add a pagination (show only 20 results per page) and display, above the list of files, some textbox and dropdown to filter the right content from the CAML query.

Which way do you suggest to do these two things?