thats the thing about BBQ sauces , there are 1000s of them, it can be hard to find one that you think is best , the best starting point i think would be what base you like and go from there
the 3 most common bases are : vinager molasses and tomato , theres more but these are a good starting point, most people i know like the Memphis style best ( me ) but my wife preferres the carolina ( strong vinager base ) in fact a few years ago i had a freind that i had to make a quart of the carolina sauce each month for .its all a matter of taste and the quest to find your perfect sauce can be a long one