I have yet to hear ANY speaker that convinced me that I was listening to live music. While we are on that subject... I have heard live music that sounded so bad that I would rather listen to some of my recorded music. So live or recorded is not the ishue. Yes, of course some speakers are better than others... that is why we are all here sharing ideas and experiences and trying new things. For me, my latest try was the 2Pi Tower and and I am not done(with Pi's nor dynamic speakers) as I will be trying out the Theater 4 in the future. Like I said, I WAS impressed with the 2Pi Tower and as I stated it did best some other speakers very easily, in my opinion it was not better than the MMG, JMHO.
As for as dynamics go, it may be ALL ABOUT DYNAMICS for you and many others here but the Magna-planar speakers have a pretty good following and if you include other planars an even bigger following. So, there must be some people out there(including me) who do appreciate the planar sound even while the speakers may not be as dynamic as box speakers. And there must be somethings good about them as some here at the Pi speaker forum can appreciate some of their qualities.
For me personally(my opinion) the "sound stage" and the "sweet spot"(when properly set up) are two traits which favor the planars heavily and are pros that require other good features from MMG competitors to equal or overcome these benifits of planars. If the Theater 4's are as good as many here testify then I will be a happy camper. I AM HOPING the Theater 4's will best the MMG's (for my taste) as I will have found a better speaker than I already have and I will enjoy the music more than I do with the MMG's.