Maggies, for some music, require a subwoofer. I haven't had any real issues with integrating them in my room. I use an M&K to great effect. The SMG-a is generally considered a better speaker than the MG-1. They are much more efficient, thus requiring much less power to sound good. The frequency specs are almost the same. The SMG-a just has a much better designed crossover. I have owned two pairs of MG-1's, MG-1C's, and SMG-a's. I sold everything else and still have the SMG-a.
That being said, I would likely pass on the speakers in question at $200. They can be had for cheaper, considering the need for repair.