I have an ereader but I just don't like starring at something electronic for a long period of time. I spend quite a long time on the computer, and I rather read books on the side. Real books that is. Where I can feel the pages and see the books stacked proudly on my bookshelf after I'm done.
You don't have an option that offers a better split. I'm surprised by that, given the lending capabilities that the Nook, and now the Kindle offer there is a potential for readers to split their reading more evenly. I'm not there yet, but I'm moving that direction.