I vote for the Balvenie 21. Better IMO than the Glenlivet XXV and Glenfiddich 30, in addition to the younger Livets and Fiddiches. I like it better than the other Balvenies I've tried: Doublewood, Single Barrel, Madeira 17.
If you're strapped for cash, check out the Glenlivet Nadurra Triumph 1991 - great value. Get it while you can.