Serving files to users…

Background:  Smallish, private, and login protected site that serves files to users directly, and generic files delivered based on membership options. (some files contain personal content)

Question:  What method of serving the files to the user would you suggest?

Right now I bring up a dynamic form that lists the files, each with a button for downloading/viewing.

The form is probably stupid, and I’ve thought of sending information through the url to a php file for processing and posting.

Suggestions?  (narrow or broad, I welcome them all)

BTW—You folks make me smarter, and I appreciate all the past help.