BB's were a great first cook, Eric, and glad they turned out for ya! You sayin' you cooked 'em SLOWER on your kettle on previous cooks and they didn't turn out as well? I find that the wsm has more moisture in the cooker than the kettle, ESPECIALLY if using water. This translates more to the texture of the bark, and if foiling, I might not use water, but if not, I always use water and find the meat seems to be not so quick to dry out, at least on the outside...all things equal if you don't overcook. See what works for you and don't just take anybody's word for it regarding the pan.
Sorry if ya thought I was suggesting starting with a brisket. Maybe getting a little ahead of ya, or myself, but so many guys think they need a bigger smoker to do decent size briskets so I guess I was encouraging you not to be the next guy that posts about his four pound partial flat never getting tender and drying out.