If what you dislike about the Bourbon County Stout is that it is thick and syrupy, that is probably not going to change. Like Three Floyd's Dark Lord, the thick as oil sludge consistency is somewhat the nature of the bourbon aged stout beast.
However, if you enjoy the flavors, but would like them in a "lighter" beer, then Goose Clybourn just put on the Bourbon Aged Imperial Brown Goose this week. Instead of a stout base, its a brown ale base, aged in Heaven Hill casks for 3-4 months. It really picked up the vanilla and bourbon, and packs an alcohol wallop. (If you had last year's example, there is really no comparison, its a completely different, stronger, more flavorful beer this year).
The goose taplist is also in really good shape this week with a number of other very good beers to choose from. One of my favorites is Wheatmiser (a very sweet and strong wheat wine) that was an award winner at this year's GABF (Great American Beer Festival). They also have the Old Aberration on tap (an over the top barley wine) and a Dunkelweizenbock (which is a medium dark, lightly sweet wheat beer). And a nice clean Schwartz, a "light" dark beer that has the roasty flavor without the heavy body that most associate with dark beers.
cheers!