I think you've hit on something that keeps me from buying Maggies as well. While I appreciated all the things the speakers were doing right (I heard 3.6s by the way), the thing that was notably missing for me was something I'd call, for lack of a better term, dynamic thrust or the ability to "feel" as well as hear individual sounds. My guess is that dynamic speakers focus individual sounds more (for better or worse I guess) which may allow more of the sound to propel forward and more letting you feel as well as hear dynamic impact -- individual sounds just have more oomph. Maggies obviously throw bigger and relatively more diffuse images and maybe as a result dont focus energy as much and diminish physical impact. Obviously you can augment bass with subs and that's fine, but I'm talking about even the mids/lower mids -- think baritone sax or perhaps the lower registers of a tenor sax, which seem to lack some dynamic power although they otherwise sound excellent.
Anyway, if that's what you meant your choice of dynamic vs. planar may come down to this critical difference between the technologies. I didn't spend enough time with Maggies to get a sense of their soundstage depth capabilities, but I have with Vandies and I thought they were among the best I've heard in that area. Combining these areas I'd think Vandies would be well worth a look. Hope this helps and best of luck.
