I like Jefferson's Reserve, finished in old rum casks. I also like Angel's Envy, finished in port wine barrels. I save these two for special occasions.
For normal functions, Basil Hayden's from Costco is tough to beat. It goes on sale, pretty regularly, for less than $30 a bottle.
All good picks. Angel's Envy is my favorite. Jefferson Reserve is a very close second. I also like Four Roses Single Barrel.
