Larceny bourbon - there's a Youtube channel called "How to Drink" where the guy did a 10 bottle blind tasting: a $3000 Pappy Van Winkle and nine other similar bourbons (ranging in price from about $30 to $200). The Larceny (about a $30 bottle) came in second place; the Pappy was way down in the ranking.
Anyways, I tried the Larceny, and it was pretty darn good. Certainly an inexpensive alternative - but since I've never had Pappy, I'm just relying on the "How to Drink" dude.