I am in a MSN Education, and I find it to be great preparation for the road that lies ahead. In my (geographic) area, there are not too many of these programs around. The one I attend is quite expensive, so aome people go to a city or state school, and don't get the MSN in Ed, but in something else, and intend to teach.
IMHO, I think that it is important to learn how to teach, which is what the bulk of my classes (after the core classes) involve. Teaching strategies, curriculum development, test construction, and issues in higher education are among the things I've taken. Often the focus is not on Nursing Ed (although they are all 'nursing' classes), but higher ed, and teaching/learning theories and styles. We do, of course, touch on issues specific to nursing. There's a lot of 'sharing' in the classes (group projects, discussions, and reflections).
If you are certain that this is the way you want to go (education, that is), I would go for it. But of course, you'll have some time to decide, while you get the BSN (I remember asking my nursing prof's the same question when I was in the last semester of my ADN as well).