We were fortunate to have ordered our 2016 Navion M before they discontinued the model. We ordered ours May of 2015 and picked it up in September of last year at Lewis in Ohio. One of the last ones manufactured.
I'm not sure I would have bought any other floor plan as we absolutely love the open floor space of this unit.
They did away with the air mattress some time ago. We do use a self inflating mattress pad on the fold out bed and find it quite comfortable.
Ours has the profile roofline with a fantastic front picture window and we also avoided the large front vent in favor of a Fantastic fan vent with remote.
I saw on one website that Winnebago may do a major redesign and bring that floor plan back some time later.
Alan
2016 Navion M