I do enjoy Sweet Baby Ray's. Montgomery Inn makes a great sauce if you can find it near you, a little runnier than most, but darn good on sandwiches.
Often when making pulled pork I make a sauce like concoction of the stuff left in the bottom of the pan after slow cooking overnight. Usually use cola, liquid smoke and a shot of whiskey to keep the pork moist while roasting. Start with whats left and add some ketchup, mustard and whatever else suits my fancy and reduce it down to a sauce and put it back on the pork once it is shredded/chopped