I won't bend your ear further about the disadvantages of DRM :-) But I will mention that Baen Books has been selling DRM-free e-books for many years. They might be willing to talk to you about how it has been working for them, and how they have persuaded (some of) their authors to sign on. Eric Flint, in particular, is an author and an editor for Baen (I think) who is a vocal supporter of doing business this way.
The Baen Free Library (do you want some science fiction? The first taste is free...) is here:
http://www.baen.com/library/
(Note: they don't give everything away--Nobody could make money doing that--they give *some* things away and charge for others! The Baen Free Library is the free section.)
The books they sell are at:
http://www.webscription.net/