I got 11% off my LE w/o even breaking a sweat (thought they wouldn't deal on such a low serial #), so you should be able to get another couple of % off with some strong negotiating. The demo part is interesting. It's not many miles, so they may not budge much. If it had a couple 1000 miles on it you would have a stronger position.
Those are nice options you listed. Your wifey is lucky.
Good luck with your negotiations.