Having tried JBW, JBB and some WT101 for my nightcaps for the last two months, I'd have to rank 'em as follows:
1. Jim Beam Black by a razor over WT101. A virtual tie.
2. WT101. A good, stout poor. Sends me to bed with a buzz.
3. JBW. Cheap, but rough around the edges. Not quite as smooth as JBB.
PS: Of course, I always have 1.5-2.0 oz. of bourbon w/ Diet coke on ice. I've sipped my Bourbon "neat", but really can't stand it that way. YMMV, and surely will.