Great choice on the 20yr old Van Winkle MM!
I've had a lot of Bourbons and the entire ORVW line is hard to beat. Even the 10 yr old is Excellent! The 15 year and 12yr are the best bang for the buck IMO, but the 20yr is the best tasting IMO. For those who are not used to Bourbons, the ten year old at about $30 is a great place to start. I drink them all straight most of the time but will occasionally add a single ice cube to bring out some of the "locked in flavors".
Every year, I get as much of ANY of the VW lineup that I can and then ration it over the upcoming year. Almost all of the stores that carry it around here will limit each purchase to only 1 or 2 bottles of each at a time. All of them sell out with in a week here. I can't order liquor on line because no one ships to my state. I was able to get 2 the 23 year old crystal sets this year and will give an update on it when I open the first one ( after Christmas - it's my present from my incredible wife!)