What do you consider to be the bottom end of the good U.S. bourbon/whiskey?
Personally, I really only collect the wheated bourbons. If you look at my attachment, thats basically the tree to the far left.
The bottom end, I personally feel, is maybe around the Weller 12 year for me. A bit challenging for me to find personally, but can be found often enough at a very fair price. You might also try Makers 46. Little better than Makers Mark, IMO.