i'm a big fan of vintage champagne. the '96's are killer, but starting to lose some vibrance. They'll still drink well for years, but I tend to prefer my older bubbles to be younger. That doesn't really make sense does it? 6-10 years old is a good window.

'98 was ok, but seems to be characterized by higher acidity, which is less pleasing to me than the biscuit-type flavors and mineral notes. Perhaps a '00 is in order, since that's when the madness began.

The event might call for a good single malt as well. In any case I can definately see splurging a bit, this is as good a cause for celebration as any, and better than most.