I have a DX (older model), and a new Paperwhite (which I really like). It has better battery life, backlighting, and etc. I still read technical books in paper

I have a DX (older model), and a new Paperwhite (which I really like). It has better battery life, backlighting, and etc. I still read technical books in paper, but I read business / personal development books primarily on the kindle.