$100k for the M4 is understandable. I can see it starting at $80k easily. Out the door I can see it costing just over $100k. Depending on how production is from the start dealers may be charging a premium over MSRP.
It just all adds up way too fast. It's exciting to play around with the configurator but when the total comes up you eyes really open. Then you have to go back and see which package and options you can justify.