I had a buddy that had some "Mangeplanars" back in the early 80's. Are they the same speaker? The look similar to the MMG's but were taller, I'd say about 6 feet tall, (I'm going from memory). They had wood sides and had black fabric covering the ribbons. He powered them with a big-*** Nakamichi amp. Just like everyone else here, I remember them sounding awesome with jazz and stuff, just didn't have the bass that normal cone speakers give you.
I remember seeing a speaker years back that had a planar uppersection mounted to a cabinet with a woofer at the bottom. I would think that this arrangement would be the best of both worlds.
By the way, isn't it Planar, not Planner?