I find myself (and the wife) going back to Van Winkle Special Reserve 12 year time and time again. There are times we will have 4-5 different bottles of bourbon in the house and this is the one we seem to keep buying. Not super expensive, but not cheap either (~$50/bottle?). Well worth it in my opinion.
An excellent bottle, which I need to replace. Some of my other favorites include
Black Maple Hills
Rare Breed
Four Roses Single Barrel