The Delaware Law Office is a fan of law books on CD, and has been for years. When you consider how much can actually fit on one of those CDs, it really becomes a decision that doesn't require a great deal of thought.
There is something about having a book in your hands that can't be duplicated by the keyboard and monitor. But it's something that you can learn to do without when you consider the savings in terms of space, and convenience.
Just how large is the law library in your office? Law.com has an article that looks at law firms and their libraries: Revolution or Evolution for Law Libraries?