Restricting Editing capabilities

I've looked through the messages in this section and can't find an answer. Sorry if I missed it.

I really need to restrict the editing capability in the Wiki to Admins (or perhaps a designated role), but allow other selected groups to be able to read everything. It seems to me the easiest answer for this is to add Admins and/or Author levels to the Wiki Privileges section.

This would eliminate the need to add 'code' to the visible wiki editor everyone can now access.

Unless someone has another way to separate readers from those capable of editing, I could really use something of this nature.

Thanks in advance.