Charles,
I can't begin to tell you how badly I feel for you right now. Hopefully it was just a teenage "joy ride" and they'll find it intact with only a few more miles on the clock. But since the thieves knew enough to pop the lock cylinder, my fear it that you we dealing with someone a bit more experienced at this.
When the insurance company calls, I'd recommend the "don't ask don't tell" on the mileage. Don't lie to them, but don't offer up more than they need to know.
Perhaps this is just a sign that a new 4.8is was your destiny
Good luck, my friend, and keep us posted.
Jeff