I agree that you should view using a single driver speaker as an experiment. It may or may not make you a convert, but it certainly will teach you quite a bit about the differences b/t dynamics and s.d. horns.
In that regard ED's speaker is a no brainer. Cheap, easy to store and easy to sell(it seems). I was very willing to spend more, and viewed this as a short term experiment. Funny though, I've had my meadowlarks out only about 2 weeks in the last 8 months, although, as I've said above, 3 watts just isn't enough to drive them.
have fun.