I have the E20-OM and I absolutely love it! It's my first OM because I have always been a dread guy but it just may convert me to an OM guy. I have an Eastman AC-720 dread that is a great guitar and I had heard so many great things about the E series, I had to see what all the hype was about. I couldn't be happier with it.
It is by the far the most easily playable guitar I have ever owned. The tone is amazing, sweet, rich and very full sounding. I was worried the bass would be lacking in a smaller guitar, definitely not the case with this one, but it isn't overpowering either, the balance is superb.
I read a lot of reviews before I bought it and watched some videos. The video that sold me on it is the one posted below. The video is a pretty good representation of what my guitar sounds like.
http://www.youtube.com/watch?v=DCwbltiYB0s
Kurt