I am guessing between $99,900 and $104,000 (more likely on the lower end of the range rather than higher, to give some breathing room for the eventual Competition Package), with a well-optioned model without CCBs costing about $120,000 or so.
The E63S has a MSRP of $104,900, but it also has marginally more power. I don't believe BMW will price its base model above the Mercedes, and a nicely optioned E63S comes out to about $122,000.
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