Mack,
That's great that you found a bottle of Stagg still on the shelves. With the 2007 release just around the corner, you are fotunate to have found an '06 bottle. My suggestion would be to cut the Stagg down to a drinkable proof. While I have had the Stagg at bottled proof, I believe the high alcohol masks many of the flavors, both dominant and subtle that exist in a good bourbon (especially this one). The next release of GTS will be 144+ proof, or as it will be known, Hazmat IV. Enjoy.