Jack? It took me years to get through a bottle of No. 7. Gentlemen Jack is a little better, but not even in the same league as something like Knob Creek to me, and yet about the same price.
I have tried the single barrel, and I did like it, but not enough to buy a bottle. I got it in a bar when I asked what bourbons they had and they replied "Jim Beam, Wild Turkey, or Jim Beam Black" I ordered the JBB only to watch them pull out the JD Single Barrel and pour it. As I looked over the bar, I realized they didn't have JBB, but I had wanted to try the JDSB so I accepted it.